2023 in Review: Good News
Animated Fact
Spain sees the world's first lung transplant performed entirely by robot: https://www.euronews.com/next/2023/04/19/spain-sees-the-worlds-first-lung-transplantation-performed-entirely-by-robot
Ocean treaty: Historic agreement reached after decade of talks: https://www.bbc.com/news/science-environment-64815782
500 baby sharks to be released: An exclusive look at an unprecedented mission: https://www.nationalgeographic.com/magazine/article/shark-rewilding-indonesia-oceans-conservation-zebra
Wind and solar are now beating coal in the US: https://electrek.co/2023/04/27/wind-and-solar-are-now-beating-coal-in-the-us/
Scientists report world’s first X-ray of a single atom in Nature: https://www.ohio.edu/news/2023/05/scientists-report-worlds-first-x-ray-single-atom-nature
2023 in Review: Space Edition
Animated Fact
Euclid Telescope: https://www.bbc.com/news/science-environment-67343374
Chandrayaann 3: https://www.space.com/india-chandrayaan-3-moon-landing-success
How to Clean Up Space
Animated Fact
Laser Broom related:
Remote controlled debris removal systems:
Space Net:
https://conference.sdo.esoc.esa.int/proceedings/sdc7/paper/434/SDC7-paper434.pdf
Harpoon:
https://www.sstl.co.uk/media-hub/latest-news/2019/removedebris-success-for-harpoon-experiment
(as well for speed of debris being 30,000 mph)
A Black Hole Appears! What Now?
Animated Fact
Primordial black holes may flood the universe. Could one hit Earth? https://www.space.com/primordial-black-hole-earth-collision-probability#
A Coin-Sized Black Hole Would Destroy Earth – Here's How: https://www.newsweek.com/penny-sized-black-hole-earth-what-would-happen-1579750
What Would Happen If a Coin-Sized Black Hole Were Placed at the Earth’s Center? https://slate.com/human-interest/2014/02/if-a-coin-sized-black-hole-were-placed-at-earth-s-center-what-would-happen.html
Black Hole Math: https://www.nasa.gov/wp-content/uploads/2013/05/black_hole_math.pdf
What Happens When a Black Hole Dies? https://www.forbes.com/sites/quora/2017/06/30/what-happens-when-a-black-hole-dies/
Gale, R. P. & Hochhaus, A. (2023): Nuclear war and physicians’ social responsibility. https://www.nature.com/articles/s41375-023-02025-5
How You Can Be Happier – According to Science
This piece is based on our video: "An Antidote to Dissatisfaction"
The detailed sources can be found here: https://sites.google.com/view/sources-dissatisfaction/
Are YOU the Center of the Universe?
This piece is based on our video: "The SMALLEST to the LARGEST Thing in the Universe – The Ultimate Size Comparison"
The detailed sources can be found here: https://sites.google.com/view/sources-middle-of-scale/
THIS is a Whale
Fully Developed Story
How did whales evolve?
https://www.smithsonianmag.com/science-nature/how-did-whales-evolve-73276956/
Original papers:
Transitional record:
https://evolution-outreach.biomedcentral.com/articles/10.1007/s12052-009-0135-2
A Bacteria That Eats Plastic and Produces Vanilla Flavor?
Animated Fact
Marine Plastic Pollution: https://www.iucn.org/resources/issues-brief/marine-plastic-pollution
Plastics, EDCs & Health: https://ipen.org/documents/plastics-edcs-health#:~:text=EDC%20exposure%20is%20a%20universal,microplastic%20and%20expose%20the%20population
Genetically engineered microbes convert waste plastic into vanillin: https://www.chemistryworld.com/news/genetically-engineered-microbes-convert-waste-plastic-into-vanillin/4013767.article
Could plastic-eating enzymes help curb pollution? https://www.dw.com/en/could-plastic-eating-enzymes-help-curb-pollution/audio-66156192
The Dangers Of Plastic Water Bottles: Why You Should Ditch Them For A Reusable Bottle: https://www.ozmo.io/the-dangers-of-plastic-water-bottles-why-you-should-ditch-them-for-a-reusable-bottle/#google_vignette
Plastic: It's Not All the Same: https://plasticoceans.org/7-types-of-plastic/
Can plastic-eating enzymes solve the recycling problem? https://channels.ft.com/en/rethink/can-plastic-eating-enzymes-solve-the-recycling-problem/
Technical, Economic, and Environmental Comparison of Closed-Loop Recycling Technologies for Common Plastics: https://pubs.acs.org/doi/10.1021/acssuschemeng.2c05497
Genetic Engineered Ideonella Sakaiensis Bacteria: A Solution of the Legendary Plastic Waste Problem: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3194556
Plastic pollution is growing relentlessly as waste management and recycling fall short, says OECD: https://www.oecd.org/environment/plastic-pollution-is-growing-relentlessly-as-waste-management-and-recycling-fall-short.htm
Plastic-eating bacteria: Genetic engineering and environmental impact:https://www.livescience.com/plastic-eating-bacteria
Bacteria really eat plastic: https://www.sciencedaily.com/releases/2023/01/230123083443.htm#:~:text=Based%20on%20a%20model%20study,plastic%20soup%20in%20our%20oceans
Microplastics Are Polluting the Ocean at a Shocking Rate: https://www.wired.com/story/microplastics-are-polluting-the-ocean-at-a-shocking-rate/#:~:text=Some%2011%20billion%20pounds%20of,hope%E2%80%94if%20countries%20act%20now.&text=If%20you%20throw%20a%20polyester,as%20quite%20its%20former%20self
The Boomers of the Universe
This piece is based on our video: "The Last Thing to Ever Happen in the Universe"
The detailed sources can be found here: https://sites.google.com/view/sources-sources-lastthing/
What Happens When You Get a Tattoo?
This piece is based on our video: "Your Tattoo is INSIDE Your Immune System. Literally."
The detailed sources can be found here: https://sites.google.com/view/sources-tattoo-inside/
What's Stopping Us From Colonizing the Solar System?
Animated Fact
Overview
Space Colonization: https://www.nasa.gov/headquarters/library/find/bibliographies/space-colonization/
The expert guide to space colonies: https://www.bbc.com/future/article/20141002-time-to-plan-a-space-colony
The future of space colonization – terraforming or space habitats? https://phys.org/news/2017-03-future-space-colonization-terraforming-habitats.html
The Human Body in Space: https://www.nasa.gov/humans-in-space/the-human-body-in-space/
Size of the Space Economy/reductions in Launch costs
Thomas Roberts, “Space launch to low earth orbit: How much does it cost?,” Center for Strategic and International Studies, September 2020 in https://www.mckinsey.com/industries/aerospace-and-defense/our-insights/the-role-of-space-in-driving-sustainability-security-and-development-on-earth#/
The role of space in driving sustainability, security, and development on Earth, McKinsey & Co. https://www.mckinsey.com/industries/aerospace-and-defense/our-insights/the-role-of-space-in-driving-sustainability-security-and-development-on-earth#/
Cost of sending people to space
NASA Should Send $17 Billion dollar human mission to Mars https://www.forbes.com/sites/jamiecartereurope/2023/05/18/nasa-should-send-17-billion-human-mission-to-mars-in-2033-say-experts/
Radiation
Review with many useful pointers:
https://www.mdpi.com/2673-592X/3/1/5
Magnetic Shields
https://phys.org/news/2022-05-magnetic-astronauts-dangerous-space.html
Plasma Shields
Consequences of exposure to Space Radiation:
https://www.mdpi.com/2075-1729/4/3/491
Effects of Gravity
Artificial gravity:
Treating the symptoms on their own:
https://www.nasa.gov/humans-in-space/the-human-body-in-space/#section-4
Isolation and Confinement
Solutions and Strategies: https://journals.physiology.org/doi/full/10.1152/japplphysiol.00928.2015
The Battle of Two Titans Decides Our Fate as a Species
This piece is based on our video: "How to Destroy the Universe"
The detailed sources can be found here: https://sites.google.com/view/sources-interstellarwar/
Alien Weapons, Part 1
This piece is based on our video: "How to Win an Interstellar War"
The detailed sources can be found here: https://sites.google.com/view/sources-interstellarwar/
What Jobs Are Needed on a Space Colony?
Animated Fact
Salotti, Jean-Marc (2020): Minimum Numbers of Settlers for Survival on Another Planet. https://www.nature.com/articles/s41598-020-66740-0
Permanent Mars Colony is 'Long Way Down the Road' Nasa Says: https://www.space.com/32325-nasa-mars-colony-crewed-mission-outlook.html
Space Colonies Will Start Out Like the Wild West, Grow Family-Friendly: https://www.space.com/35179-space-colonies-for-future-humanity.html
How to create a bill of rights for Mars colonies: https://www.bbc.com/future/article/20140709-why-mars-needs-a-bill-of-rights
The Human Factor in the Settlement of the Moon: An Interdisciplinary Approach: https://books.google.de/books?id=hAlQEAAAQBAJ&printsec=copyright&redir_esc=y#v=onepage&q&f=false
How do you stop astronauts going mad? https://www.bbc.com/future/article/20170208-how-do-you-stop-astronauts-going-mad
Human Enhancements: New Eyes and Ears for Mars: https://link.springer.com/chapter/10.1007/978-3-030-42036-9_6
Meusburger, Sandra Häuplik & Bishop, Sheryl (2021): Space Habitats and Habitability Designing for Isolated and Confined Environments on Earth and in Space. https://www.google.de/books/edition/Space_Habitats_and_Habitability/1wcxEAAAQBAJ?hl=en&gbpv=1&dq=Space+Habitats+and+Habitability&printsec=frontcover
Your Brain Is Stupid
This piece is based on our video "The Internet Is Worse Than Ever – Now What?"
The detailed sources can be found here: https://sites.google.com/view/sources-why-we-hate-each-other/
Why Do Planets Rotate in a Disk?
Animated Fact
Why do the planets orbit in a plane parallel to the spin axis of the Sun?
Why is the Solar System flat and not a sphere? https://www.zmescience.com/feature-post/space-astronomy/solar-system/why-solar-system-flat/
Our Solar System: Facts: https://science.nasa.gov/solar-system/facts/
How Did Homeopathy Become so Successful?
This piece is based on our video "Homeopathy Explained – Gentle Healing or Reckless Fraud?"
Basic principles of homeopathy:
List of homeopathic remedies: https://homeopathycenter.org/search-materia-medica/
Information on various homeopathic potencies:
http://www.homeopathichealing.org/x-c-and-m-the-alphabet-of-homeopathic-potency.html
Physical examination of the dilution: https://onlinelibrary.wiley.com/doi/abs/10.1111/j.2042-7166.2012.01162.x
Hahnemann's explanation for the effectiveness of homeopathy despite dilution:
§ 270 Sixth edition
http://www.homeoint.org/books/hahorgan/organ260.htm#P270E5
Hahnemann's rules for taking homeopathic remedies, Organon (Collection) of Medicine §260 6th edition: http://www.homeoint.org/books4/organon/org260.htm#p270
Studies on the lack of effectiveness of homeopathic products:
Statement of the European Academies Science Advisory Council September 2017: https://easac.eu/fileadmin/PDF_s/reports_statements/EASAC_Homepathy_statement_web_final.pdf
Systematic studies by Mathie et. al. and other employees of the Homeopathic Research Institute: https://systematicreviewsjournal.biomedcentral.com/articles/10.1186/s13643-017-0445-3
FDA statement requiring homeopathic companies to prove the efficacy of their products: https://www.ftc.gov/system/files/documents/public_statements/996984/p114505_otc_homeopathic_drug_enforcement_policy_statement.pdf
Statement from the FDA on their approach to homeopathic remedies: https://www.fda.gov/regulatory-information/search-fda-guidance-documents/homeopathic-drug-products-guidance-fda-staff-and-industry
How Does Beaming Work?
Animated Fact
Quantum teleportation: https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.70.1895
Teleportation Physics: https://sgp.fas.org/eprint/teleport.pdf
Quote: “whereas the extraction of a minimum of 10^28 kilobytes will be required to encode and store an entire human being.”
A quettabyte: 10^30 byte
A kilobyte: 10^3 byte
=> 10^28 kB = 10^31 B = 10 QB
Transmitting the info of a human would take quadrillions of years:
and in more detail:
https://journals.le.ac.uk/ojs1/index.php/pst/article/view/2089/1993
Calculations:
2.977*10^19 bits/s = 3.72125*10^18 bytes/s
10 quettabytes = 10^31 bytes
=> 10^31/(3.72125*10^18) = 85213 years
The Last Thing to Ever Happen in the Universe
This piece is based on our video: "The Last Thing to Ever Happen in the Universe"
The detailed sources can be found here: https://sites.google.com/view/sources-sources-lastthing/
How Radioactive Are Your Teeth?
Fully Developed Story
520 nuclear tests, yield of 545 megatons:
https://www.unscear.org/docs/publications/1993/UNSCEAR_1993_Report.pdf
10,000 cancers per megaton, including FvH commentary:
https://www.tandfonline.com/doi/abs/10.1080/08929880903368682?journalCode=gsgs20
Summary article as a general source
https://www.americanscientist.org/article/fallout-from-nuclear-weapons-tests-and-cancer-risks
World's Deadliest Parasitic Disease
Animated Fact
The History of Malaria, an Ancient Disease: https://www.cdc.gov/malaria/about/history/index.html#:~:text=By%20the%20end%20of%201949,eliminated%20from%20the%20United%20States.
Exploring the spatiotemporal drivers of malaria elimination in Europe: https://malariajournal.biomedcentral.com/articles/10.1186/s12936-016-1175-z#:~:text=By%201975%2C%20Europe%20was%20declared,retained%20that%20status%20ever%20since.&text=Factors%20that%20might%20have%20driven,Europe%20have%20been%20widely%20discussed.
Malaria WHO: https://www.who.int/news-room/fact-sheets/detail/malaria
Malaria WHO graphic: https://www.who.int/multi-media/details/worldwide-in-2021-there-were-an-estimated-247-million-malaria-cases
How do you catch it? https://www.cdc.gov/malaria/about/faqs.html#:~:text=Malaria%20may%20cause%20anemia%20and,confusion%2C%20coma%2C%20and%20death.
Symptoms and Diagnosis: https://www.lrb.co.uk/the-paper/v42/n11/steven-shapin/drain-the-swamps
Why don't we just kill all the mosquitoes?
What about genetic engineering?
Vaccines:
What can we do to fight Malaria?
Why Are You Alive?
This piece is based on our video: "Why Are You Alive – Life, Energy & ATP"
The detailed sources can be found here: https://sites.google.com/view/sourceswhyareyoualive
Could Aliens Destroy Us From Light-Years Away?
This piece is based on our video: "How to Win an Interstellar War"
The detailed sources can be found here: https://sites.google.com/view/sources-interstellarwar/
Additional Source:
What If Earth Suddenly Turned into Gold?
This piece is based on our video: "What If the Earth Turned to Gold? The Gold Apocalypse"
The detailed sources can be found here: https://sites.google.com/view/sourcesgoldapocalypse/
How Old Can You Possibly Get? (According to Science)
Animated Fact
How long can we live? https://www.nytimes.com/201/04/28/magazine/human-lifespan.html
Scientists up stakes in bet on whether humans will live to 150: https://www.nature.com/articles/nature.2016.20818#/b1
Life Extension: https://www.billhalal.com/blog/life-extension/
On natural limits to lifespan:
Healthspan:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6136295/
Lifespan:
https://www.nature.com/articles/s43587-022-00291-z
Limit to lifespan through loss of resilience:
https://www.nature.com/articles/s41467-021-23014-1
Current Life expectancy:
71 years in 2021, 66.5 in 2000 https://ourworldindata.org/life-expectancy#life-expectancy-has-improved-globally
Dying of ‘old age’:
Leading causes of death: https://www.cdc.gov/injury/wisqars/pdf/leading_causes_of_death_by_age_group_2020-508.pdf
Where Are the Aliens? The Dark Forest Theory
This piece is based on our video: "Why We Should NOT Look For Aliens – The Dark Forest"
The detailed sources can be found here: https://sites.google.com/view/sources-darkforest/
Let's Destroy Maths!
Animated Fact
Ancient Babylonian Number System Had No Zero: https://blogs.scientificamerican.com/roots-of-unity/ancient-babylonian-number-system-had-no-zero/
What is the origin of zero? How did we indicate nothingness before zero?https://www.scientificamerican.com/article/what-is-the-origin-of-zer/#:~:text=The%20first%20recorded%20zero%20appeared,the%20end%20of%20the%20eighth.
We couldn’t live without ‘zero’ – but we once had to: https://www.bbc.com/future/article/20161206-we-couldnt-live-without-zero-but-we-once-had-to
Number system without zero: https://paradise.caltech.edu/ist4/lectures/foster%201947%20decimal%20no%20zero%20number%20system.pdf
It's an El Niño Year! But What Is It?
Animated Fact
Could have been around for thousands of years:
Around 30 events since 1900:
Different types of El Niño:
El Nino Southern Oscillation
canonical Eastern Pacific
central Pacific -> more frequent atlantic hurricanes (see here)
These are disputed (too few data points, no variations found under different methods or wrong type of distinction)
Affects tropical cyclone formation and landfall:
Not all effects are guaranteed:
below average rainfall (Indonesia and north. South America)
above average rainfall (southeastern South America, eastern equ. Africa and southern US)
What Happens When You Swallow a Tapeworm?
Animated Fact
Breedlove, B. & Bradbury, R. (2022): Tapeworm Enigma. In: Emerging Infectious Diseases, p. 1306–1308. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9155875/
Warrell, D.A. (2020): Injurious Arthropods. In: Hunter's Tropical Medicine and Emerging Infectious Diseases (Tenth Edition). https://www.sciencedirect.com/science/article/abs/pii/B9780323555128001381#f0045
Do We See the Same Colors?
Animated Fact
You won't believe your eyes: The mysteries of sight revealed: https://web.archive.org/web/20080706001354/http://news.independent.co.uk/world/science_technology/article2336163.ece
How we see color - Colm Kelleher: https://www.youtube.com/watch?v=l8_fZPHasdo
Neil deGrasse Tyson Explains How We See Colors: https://www.youtube.com/watch?v=OtcxYsUS_wc )
Your Color Red Really Could Be My Blue: https://www.livescience.com/21275-color-red-blue-scientists.html
Mometrix: Reflection, Transmission, and Absorption of Light
Something is Killing YOU Silently
Animated Fact
WHO Sources:
Air pollution: https://www.who.int/health-topics/air-pollution#tab=tab_3
Landing page for effects of pollution on health: https://www.who.int/teams/environment-climate-change-and-health/air-quality-and-health/health-impacts/exposure-air-pollution
WHO Guidelines: https://www.who.int/publications/i/item/9789240034228
Mortality from environmental pollution: https://www.who.int/data/gho/data/themes/topics/sdg-target-3_9-mortality-from-environmental-pollution
Some numbers from this:
24% of all global deaths are linked to the environment
91% of world’s pop lives above WHO guideline limits
Ambient Air pollution: https://www.who.int/teams/environment-climate-change-and-health/air-quality-and-health/sectoral-interventions/ambient-air-pollution
British Heart Foundation:
Can air pollution kill you? https://www.bhf.org.uk/what-we-do/news-from-the-bhf/news-archive/2020/february/can-air-pollution-kill-you
Air pollution and heart health: https://www.bhf.org.uk/what-we-do/our-research/risk-factor-research/air-pollution-research
Why is air pollution a problem? https://www.youtube.com/watch?v=vYSAPwQwMTk&t=157s
Monkey With Typewriters – IN SPACE?
This piece is based on our video: "We Did the Math – You Are Dead!"
The detailed sources can be found here: https://sites.google.com/view/sources-boltzmannbrain/
Can You Escape a Black Hole?
Animated Fact
This piece was created based on personal conversations with Prof. M. Caplan.
The Origin of Viruses
This piece is based on our video: "This Virus Shouldn't Exist (But it Does)"
The detailed sources can be found here: https://sites.google.com/view/sources-girus/
The Future of Healthcare
This piece is based on our video: "Why Korea is Dying Out?"
The detailed sources can be found here: https://sites.google.com/view/sources-populationcrash/
Let's Destroy a Black Hole! Part 2
This piece is based on our video: "What Happens if You Destroy a Black Hole?"
The detailed sources can be found here: https://sites.google.com/view/sources-destroyablackhole/
Moving Faster Than the Speed of Light?
Animated Fact
Einstein's Theory of Special Relativity: https://www.space.com/36273-theory-special-relativity.html, based on A. Einstein, Zur Elektrodynamik bewegter Körper, 1905, Annalen der Physik; vol. 4, t. 17, 891-921
Hubble Reaches New Milestone in Mystery of Universe’s Expansion Rate: https://science.nasa.gov/missions/hubble/hubble-reaches-new-milestone-in-mystery-of-universes-expansion-rate
Mystery of the Universe’s Expansion Rate Widens With New Hubble Data: https://science.nasa.gov/missions/hubble/mystery-of-the-universes-expansion-rate-widens-with-new-hubble-data
Homogeneity and Isotropy: https://www.astro.ucla.edu/~wright/cosmo_02.htm#MD
Cosmic Horizons: https://explainingscience.org/2021/04/30/cosmic-horizons/
Wolfram Alpha: https://www.wolframalpha.com/input?i=%28%28c%2FH_0%29%2Fradius+of+the+observable+universe%29%5E3
Are We the Aliens?
This piece is based on our video: "Ancient Life as Old as the Universe"
The detailed sources can be found here: https://sites.google.com/view/sources-big-bang-life/
How Does Lightning Work?
Animated Fact
Lightning Capitol of the world: https://www.scientificamerican.com/article/the-world-s-top-lightning-hotspot-is-lake-maracaibo-in-venezuela/
Longest Strike: https://phys.org/news/2022-02-longest-lightning-miles-states.html
Myths about Lightning: https://www.noaa.gov/stories/5-striking-facts-versus-myths-about-lightning-you-should-know#:~:text=Myth%3A%20Lightning%20never%20strikes%20in,5.
Is Humanity Dying Out?
This piece is based on our video: "Why Korea is Dying Out"
The detailed sources can be found here: https://sites.google.com/view/sources-populationcrash/
Let's Destroy a Black Hole! Part 1
This piece is based on our video: "What Happens if You Destroy a Black Hole?"
The detailed sources can be found here: https://sites.google.com/view/sources-destroyablackhole/
The Laziest Animal Ever?
This piece is based on our video: "The Horror of the Slaver Ant"
The detailed sources can be found here: https://sites.google.com/view/sources-slaver-ants/
Cryonics – Freezing Yourself For The Future
Animated Fact
Slim chances of business survival:
https://www.tandfonline.com/doi/full/10.1080/23311886.2016.1167576
Successful vitrification of a rabbit kidney:
Let's Shrink Earth!
Animated Fact
Bhaskaran, Santosh et. al. (2009): Life and Gravity. Biophysical Reviews and Letters, 4,4 https://doi.org/10.1142/S179304800900106X
De Witt, John K. et. al. (2014): The preferred walk to run transition speed in actual lunar gravity, J Exp Biol 217 (18): 3200–320 https://doi.org/10.1242/jeb.105684
What would happen if gravity was reduced by half? https://theconversation.com/curious-kids-what-would-happen-if-gravity-was-reduced-by-half-141251#:~:text=Half%20the%20gravity%20would%20reduce,to%20breathe%20in%20enough%20oxygen
Frequently Asked Questions:
Why does halving the radius lead to ⅛ of the volume?
We halved the radius of the Earth, keeping the average density of the planet the same. This allows us to roughly estimate the mass by multiplying the new volume by the unchanged density. The volume of a sphere depends on the radius to the power of three (r^3) – so halving the radius actually means dividing the volume by 8. You can see the equation for this at 0:08
What if we removed the layers instead of halving the radius?
We went with the approach of halving the radius as it seemed to us to be more logical to simply shrink Earth instead of removing the outer layers until it was half the size.
Shrinking something in a scientifically correct way is a hard thing to do, this is something we learned during the development of our VR experience.
There are two methods: either you shrink things by removing their atoms while keeping the density the same, or you shrink them by reducing the distance between atoms while increasing the density. We opted for the first technique, simply because it keeps stuff more or less the way it is, so stones will just be smaller stones after shrinking them.
Removing layers would only mean three things:
1. Changing the average density of the Earth, making our calculations a bit more complicated.
2. The outer shell of Earth would now be the Earth's mantle, which is a scorching 1000–2000°C
3. All things on Earth would immediately burn up – from flora and fauna to buildings and us humans.
So this would be a pretty boring scenario.
Why is a day 48 minutes long?
For the duration of a day, we use the formula for angular momentum. It’s the product of angular inertia (how difficult it is to start and stop the rotation of an object) and angular velocity (how quickly an object rotates around an axis of rotation). Angular inertia is proportional to mass and the square of the radius. Halving the radius led to an eighth of the mass, so the angular inertia is divided by 32 – this comes from 1/8 (from the mass) multiplied by 1/4 (from the square of the halved radius). But angular momentum needs to be conserved, so the angular velocity has to change. It needs to cancel out the inertia loss by increasing to 32 times the speed. Thus, a day will be 32 times shorter. You can see the equation for this at 0:15 in the video.
Would You Spend Your Entire Life in a Spaceship?
Animated Fact
World Ships - Architectures & Feasibility Revisited: https://www.researchgate.net/publication/236177990_World_Ships_-_Architectures_Feasibility_Revisited
Why it's Important to Surround Yourself With Beauty
This piece is based on our video "Why Beautiful Things Make Us Happy – Beauty Explained"
The detailed sources can be found here: https://sites.google.com/view/kgssourcesbeauty
How We Eradicated One of the Deadliest Diseases
This piece is based on our video "The (Second) Deadliest Virus"
The detailed sources can be found here: https://sites.google.com/view/sources-smallpox/
Why Biotechnology Advances so Rapidly
This piece is based on our video "The Most Dangerous Weapon is Not Nuclear"
The detailed sources can be found here: https://sites.google.com/view/sources-biorisk
Bananas Produce Antimatter
Animated Fact
Positrons from bananas: https://www.quantumdiaries.org/2009/07/21/positrons-from-bananas/
Price of one gram of antimatter being $62.5 trillion:
https://science.nasa.gov/science-news/science-at-nasa/1999/prop12apr99_1
Banana equivalent unit:
https://www.radiation-dosimetry.org/what-is-banana-equivalent-dose-bed-definition/
Some facts about potassium 40-K:
Banana facts:
https://fdc.nal.usda.gov/fdc-app.html#/food-details/173944/nutrients
Amount of bananas produced in 2021:
https://www.fao.org/faostat/en/#data/QCL -> 137 Million tonnes
Are You Real?
This piece is based on our video "You're a Dream of the Universe (According to Science)"
The detailed sources can be found here: https://sites.google.com/view/sources-boltzmannbrain/
How to Form Long-Lasting Habits
This piece is based on our video "Change Your Life – One Tiny Step at a Time"
The detailed sources can be found here: https://sites.google.com/view/sources-change/
Why Beauty Makes Us Happy
This piece is based on our video "Why Beautiful Things Make Us Happy – Beauty Explained"
The detailed sources can be found here: https://sites.google.com/view/kgssourcesbeauty
POV: Zombies Invade Your City
This piece is based on our video "The Reason Why Cancer is so Hard to Beat"
The detailed sources can be found here: https://sites.google.com/view/sources-cancer-city/
YOU Own The Moon!
Animated Fact
Space commons:
https://swfound.org/media/207517/swf_brief_is_space_a_global_commons_pp2301_final.pdf
Outer Space Treaty 1967: https://www.armscontrol.org/factsheets/outerspace
Artemis Accords: https://www.state.gov/artemis_at_two
Our Brains Are Not Special – Why Are We?
Animated Fact
Human brain scaling: https://www.pnas.org/doi/10.1073/pnas.1201895109
Human brain organoid integrating and connecting inside a rat brain:
https://www.cell.com/cell-stem-cell/fulltext/S1934-5909(23)00004-8
Neuron firing rates: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4879195/
Elephant brain figures: https://pubmed.ncbi.nlm.nih.gov/24971054/
POV: Billions of Lives Depend on Your Decision
This piece is based on our video "How a Nuclear War Will Start – Minute by Minute"
The detailed sources can be found here: https://sites.google.com/view/sources-mr-president/
How Do Touchscreens Work?
Animated Fact
Touchscreens: An Engineered Harmony Between Humans and Machines: https://illumin.usc.edu/touchscreen-an-engineered-harmony-between-humans-and-machines/#:~:text=Abstract,technology%20into%20our%20everyday%20lives
Touchscreens: https://www.iop.org/explore-physics/physics-around-you/technology-our-lives/touchscreen#gref
Capacitive Touch explained: https://www.youtube.com/watch?v=cFvh7qM6LdA
How a Nuclear War Starts
This piece is based on our video: "How a Nuclear War Will Start – Minute by Minute"
The detailed sources can be found here: https://sites.google.com/view/sources-mr-president/
A Rare Genetic Condition: Polydactyly
Animated Fact
Polydactyly in Development, Inheritance, and Evolution: https://pubmed.ncbi.nlm.nih.gov/29558608/
Full text: https://www.journals.uchicago.edu/doi/full/10.1086/690841#
Destroy a Black Hole?
This piece is based on our video: "What Happens If You Destroy a Black Hole?"
The detailed sources can be found here: https://sites.google.com/view/sources-destroyablackhole/
What Would Happen if the Sun Disappeared?
Animated Fact
How old is the Sun?https://spaceplace.nasa.gov/sun-age/en/#:~:text=Stars%20like%20our%20Sun%20burn,five%20billion%E2%80%94years%20to%20go.
Light travel time between Sun and Earth: https://www.pbs.org/seeinginthedark/astronomy-topics/light-as-a-cosmic-time-machine.html
If the Sun went out, how long would life on Earth survive? https://www.popsci.com/node/204957/#:~:text=Within%20a%20week%2C%20the%20average,hundreds%20of%20thousands%20of%20years.
How long can we survive without photosynthesis: https://www.newscientist.com/lastword/mg23431311-500-plant-departure/#:~:text=However%2C%20our%20species%20might%20survive,would%20last%20about%205000%20years.
What would Earth be like without the Sun? https://www.wonderopolis.org/wonder/what-would-earth-be-like-without-the-sun
What would happen if the Sun disappeared? https://www.spaceanswers.com/solar-system/what-would-happen-if-the-sun-disappeared
How Vaccines Work
This piece is based on our video: "The Side Effects of Vaccines – How High is the Risk?"
The detailed sources can be found here: https://sites.google.com/view/sources-vaccines
Is the Placebo Effect Real?
This piece is based on our video: "Homeopathy Explained – Gently Healing or Reckless Fraud?"
The Placebo and Nocebo Phenomena: Their Clinical Management and Impact on Treatment Outcomes: https://www.clinicaltherapeutics.com/article/S0149-2918(17)30077-2/pdf
Placebo interventions for all clinical conditions: https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003974.pub3/abstract
Effects of placebos without deception compared with no treatment: A systematic review and meta-analysis: https://pubmed.ncbi.nlm.nih.gov/28452193/
Caregiver placebo effect in analgesic clinical trials for cats with naturally occurring degenerative joint disease-associated pain: https://europepmc.org/article/med/28270539
New Study on the Placebo Effect and Antidepressants in Children and Adolescents: https://www.unibas.ch/en/News-Events/News/Uni-Research/New-Study-on-the-Placebo-Effect-and-Antidepressants-in-Children-and-Adolescents.html
Placebo in animals: https://www.spiegel.de/gesundheit/diagnose/homoeopathie-wieso-es-einen-placeboeffekt-bei-tieren-gibt-a-974333.html (German source)
Is Humanity Doomed?
Animated Fact
Positive developments taken from:
https://slides.ourworldindata.org/war-and-violence/#/title-slide
Renewables getting cheaper:
Global literacy development:
and it’s connection to democracy: https://ourworldindata.org/global-education#countries-with-higher-educational-attainment-in-the-past-are-more-likely-to-have-democratic-political-regimes-today
and
https://www.jstor.org/stable/25699060?seq=23
Life expectancy almost doubled:
Number of democracies around the world:
https://ourworldindata.org/democracy#key-insights
Set lower time to 2000 (https://ourworldindata.org/grapher/countries-democracies-autocracies-row?tab=table&stackMode=absolute&time=2000..latest )
Add electoral and liberal democracy numbers
2000: 85
2022: 90
Get increase:
90/85 *100 - 100= 6%
The (Second) Most Deadliest Virus on Earth
This piece is based on our video: "The (Second) Deadliest Virus"
The detailed sources can be found here: https://sites.google.com/view/sources-smallpox/
The Most Powerful Explosion in the Universe
Animated Fact
Gamma-ray bursts as a threat to life on Earth: https://www.cambridge.org/core/journals/international-journal-of-astrobiology/article/abs/gammaray-bursts-as-a-threat-to-life-on-earth/EED2E88320E43958BD6913C2F864C379
Thomas, B. (2009). Gamma-Ray Bursts as a Threat to Life on Earth: https://arxiv.org/abs/0903.4710
Are Solar Flares Over- or Underrated?
Animated Fact
NASA FAQ page on solar storms:
https://www.nasa.gov/mission_pages/sunearth/spaceweather/index.html
Our Sun Is Capable of Producing Dangerous ‘Superflares’, New Study Says: https://www.discovermagazine.com/the-sciences/our-sun-is-capable-of-producing-dangerous-superflares-new-study-says
Superflares- recent paper and press release
Attack of the Fungi
Animated Fact
It's time to fear the fungi: https://www.wired.com/story/fungi-climate-change-medicine-health/
von Lilienfeld-Toal M., Wagener J., Einsele H., Cornely O. A., Kurzai O., 'Invasive Fungal Infection', Deutsches Ärzteblatt, 116(16), 271-278, 2019, doi: 10.3238/arztebl.2019.0271.
Almeida F., Rodrigues M. L., Coelho C., 'The Still Underestimated Problem of Fungal Diseases Worldwide, Frontiers in Microbiology, 10, 2019, doi: 10.3389/fmicb.2019.00214
Gusa A., Yadav V., Roth C., Williams J., Meil Shouse E., Magwene P., Heitman J., Jinks-Robertson S., 'Genome-Wide Analysis of Heat Stress-Stimulated Transposon Mobility in the Human Fungal Pathogen Cryptococcus deneoformans', Proceedings of the National Academy of Sciences, Jan. 20, 2023, doi: 10.1073/pnas.2209831120
Warmer climate my drive fungi to be more dangerous to our health: https://www.asbmb.org/asbmb-today/science/020723/warmer-climate-may-drive-fungi-to-be-more-dangerou
The science that spawned fungal fear in HBO's 'The Last of Us': https://www.npr.org/transcripts/1157842018#:~:text=Neuman)%20True.,able%20to%20withstand%20higher%20temperatures.
Du H, Bing J, Hu T, Ennis CL, Nobile CJ, Huang G. Candida auris: Epidemiology, biology, antifungal resistance, and virulence. PLoS Pathog. 2020 Oct 22;16(10):e1008921. doi: 10.1371/journal.ppat.1008921. PMID: 33091071; PMCID: PMC7581363.
Let's Nuke the Moon
This piece is based on our video: "What if We Nuke the Moon"
The detailed sources can be found here: https://sites.google.com/view/sources-nukethemoon/
POV: You Travel Back in Time to the Early Universe
This piece is based on our video: "Black Hole Star – The Star That Shouldn't Exist"
The detailed sources can be found here: https://sites.google.com/view/sources-black-hole-star
How Much CO2 Does Your Diet Emit?
This piece is based on our video: "Is Meat Really That Bad?"
The detailed sources can be found here: https://sites.google.com/view/sources-climate-meat/
Space Elevator DIY
Animated Fact
Concept Overview: https://www.isec.org/faq/#What%20is%20it
Concept discussion: https://www.bbc.com/future/article/20150211-space-elevators-a-lift-too-far
Material discussion:
Longest diamond nanothread 90 nanometers:
Space Elevator on Mars/Moon:
https://frc.ri.cmu.edu/~hpm/project.archive/1976.skyhook/papers/scasci.txt
AI – Curse or Blessing
Animated Fact
Should We Stop Developing AI For The Good Of Humanity?
Problems in AI safety: https://arxiv.org/pdf/1606.06565.pdf
How Cancer Develops in Your Body
This piece is based on our video: "The Reason Why Cancer is so Hard to Beat"
The detailed sources can be found here: https://sites.google.com/view/sources-cancer-city/
Dying in a Nuclear Winter
Animated Fact
This piece was created based on personal conversations with Prof. M. Caplan.
The Next Atomic Bomb?
This piece is based on our video: "The Next Pandemic Will Be Man Made"
The detailed sources can be found here: https://sites.google.com/view/sources-biorisk
What Happens if Earth Suddenly Stops Rotating
Animated Fact
Earth's Magnetosphere: Protecting Our Planet from Harmful Space Energy. https://climate.nasa.gov/news/3105/earths-magnetosphere-protecting-our-planet-from-harmful-space-energy/#:~:text=As%20this%20roiling%20mass%20of,is%20known%20as%20the%20geodynamo.
What if the Earth stopped spinning? https://www.sciencedirect.com/science/article/abs/pii/S0262407911601607
Rotation: https://education.nationalgeographic.org/resource/rotation/
What would happen if Earth stopped spinning? https://www.astronomy.com/science/what-would-happen-if-earth-stopped-spinning/
What would happen if the Earth stopped rotating? https://www.abc.net.au/radionational/programs/greatmomentsinscience/what-would-happen-if-the-earth-stopped-rotating/8180664#
Das Erdmagnetfeld: Ein riesiger Dynamo. https://www.esa.int/Space_in_Member_States/Germany/Das_Erdmagnetfeld_Ein_riesiger_Dynamo
Everywhere You Look, Weird Things in the Sky
This piece is based on our video: "The Black Hole That Kills Galaxies – Quasars"
The detailed sources can be found here: https://sites.google.com/view/sources-quasars/
The Role of Our Diet in Climate Change
This piece is based on our video: "Is Meat Really That Bad?"
The detailed sources can be found here: https://sites.google.com/view/sources-climate-meat/
Hard to Believe
Emperor Penguin: https://www.nationalgeographic.com/animals/birds/facts/emperor-penguin
Polar Bear: https://www.nationalgeographic.com/animals/mammals/facts/polar-bear
Deadly Supernova
Animated Fact
This piece was created based on personal conversations with Prof. M. Caplan.
Zombie City
This piece is based on our video "The Reason Why Cancer is so Hard to Beat"
The detailed sources can be found here: https://sites.google.com/view/sources-cancer-city/
What Does The Moon Smell Like?
Animated Fact
Overview of lunar dust toxicity risk: https://www.nature.com/articles/s41526-022-00244-1 m
The toxic side of the Moon: https://www.esa.int/Science_Exploration/Human_and_Robotic_Exploration/The_toxic_side_of_the_Moon
The Mysterious Smell of Moon Dust: https://science.nasa.gov/science-news/science-at-nasa/2006/30jan_smellofmoondust#:~:text=Although%20it%20happens%20too%20slowly,Moondust%20smells%20like%20burnt%20gunpowder
How to Time Travel Without Breaking Reality
Animated Fact
Can we time travel? A theoretical physicist provides some answers: https://newsroom.carleton.ca/story/can-we-time-travel/#:~:text=Time%20travel%20also%20violates%20the,you%20cannot%20unscramble%20an%20egg
Time Travel: https://plato.stanford.edu/entries/time-travel/
Where Do Space, Time and Gravity Come From? https://www.quantamagazine.org/where-do-space-time-and-gravity-come-from-20220504/
Elliott H. Lieb, Jakob Yngvason, The physics and mathematics of the second law of thermodynamics, Physics Reports, 310, 1, 1999, 1-96,
Lawrence H. Ford, Thomas A. Roman, Negative Energy, Wormholes and Warp Drive, Scientific American. 282, 1, 2000, 46-53
Tipler Cylinder: https://www.andersoninstitute.com/tipler-cylinder.html
Lewis, D., The Paradoxes of Time Travel, Science Fiction and Philosophy, S. Schneider (Ed.), 2016 doi: 10.1002/9781118922590.ch26
Why Does Humanity Exist NOW?
This piece is based on our video "Why Aliens Might Already Be On Their Way To Us"
The detailed sources can be found here: https://sites.google.com/view/sources-grabby-aliens/
The Sun's Secret Weapon
Animated Fact
Coronal Mass Ejections: https://www.swpc.noaa.gov/phenomena/coronal-mass-ejections
NASA: Understanding the Magnetic Sun: https://www.nasa.gov/feature/goddard/2016/understanding-the-magnetic-sun
Temperature and Density: https://www.swpc.noaa.gov/products/real-time-solar-wind
Lava Temperature: https://www.britannica.com/science/lava-volcanic-ejecta
Speed: https://sci.esa.int/web/ulysses/-/42902-solar-wind-speeds
The Black Holes That Kill Galaxies
This piece is based on our video "The Black Hole That Kills Galaxies"
The detailed sources can be found here: https://sites.google.com/view/sources-quasars/
Underrated Body Parts That Keep You Alive Part IV: The Vestibular Nerve
Animated Fact
How does our sense of balance work? https://www.ncbi.nlm.nih.gov/books/NBK279394/#:~:text=The%20ear%20is%20a%20sensory,the%20utricle%20and%20the%20saccule
The physiology of balance: vestibular function
https://www.britannica.com/science/ear/The-physiology-of-balance-vestibular-function
What Happens When You Make Earth Twice as Large?
Animated Fact
Pal, A. (2018): What If The Earth Were Twice As Big?
https://medium.com/scientifical/what-if-the-earth-were-twice-as-big-c2284ebf503f
The thought experiment: What if the Earth doubled in size?
https://www.sciencefocus.com/planet-earth/what-if-the-earth-doubled-in-size/
Köchel, P. (2018): What if Earth Was Twice as Big? https://insh.world/science/earth-double-size/
Emily R. Morey-Holton (2003): 9 - The impact of gravity on life. https://www.sciencedirect.com/science/article/pii/B9780125986557500367
Strutiski, C. (2016): The Lilliput Effect – a response of life to increasing gravity?https://www.dinox.org/publications/Strutinski2016_Lilliput_Effect.pdf
POV: You're Being Attacked By Slaver Ants
This piece is based on our video "The Horror of the Slaver Ants"
The detailed sources can be found here: https://sites.google.com/view/sources-slaver-ants/
Space Without Spacesuit
Animated Fact
Kwan, J. (2021): What would happen to the human body in the vacuum of space?https://www.livescience.com/human-body-no-spacesuit
Starr, M. (2014): What happens to the unprotected human body in space? https://www.cnet.com/culture/what-happens-to-the-unprotected-human-body-in-space/
The Human Body in Space: Distinguishing Fact From Fiction: https://sitn.hms.harvard.edu/flash/2013/space-human-body/
Roth, E.M. (1968): Rapid (Explosive) Decompression Emergencies in Pressure-Suited Subjects. NASA CR-1223. NASA Contract Rep NASA CR., Nov: 1-125.
Shayler D.J. (2000): Disasters and Accidents in Manned Spaceflight, Springer-Praxis Books in Astronomy and Space Science.
Wormholes III: How to Create a Manmade Wormhole
This piece is based on our video: "Wormholes Explained – Breaking Spacetime"
Morris, M. et. al. (1988): Wormholes, Time Machines, and the Weak Energy Condition. https://authors.library.caltech.edu/9262/1/MORprl88.pdf
Humans Can Breathe Liquids!
Animated Fact
Norris, M. K. et. al. (1994): Liquid ventilation: It's not science fiction anymore. https://pubmed.ncbi.nlm.nih.gov/7780839/
Wolfson, M. R. & Shaffer, T. H. (2005): Pulmonary applications of perfluorochemical liquids: Ventilation and beyond. https://www.sciencedirect.com/science/article/abs/pii/S1526054205000278?via%3Dihub
Knight, H. (2010): Divers could breathe deep with liquid-filled lungs. https://www.newscientist.com/article/mg20827865-900-divers-could-breathe-deep-with-liquid-filled-lungs/
Sarkar, S. et. al. (2014): Liquid ventilation. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4258983/
Underrated Body Parts That Keep You Alive Part III: The Spleen
Animated Fact
Most of the time she’s busy recycling your blood, sorting out deformed and dead cells and only letting the healthy ones through: https://link.springer.com/chapter/10.1007/978-3-319-47385-7_2
When serious infections are trying to raid the body, spleen helps knock them out: https://link.springer.com/chapter/10.1007/978-3-319-47385-7_2
And if lots of blood is lost due to an accident, she’ll quickly release the reserves she’s got stored:
https://journals.physiology.org/doi/full/10.1152/jappl.2001.90.4.1623
But if, for some reason, spleen has to go into early retirement, other factory hands jump in to take over (liver, lymph system) and the factory keeps running, a little less safe against outside invaders than before:
https://www.livescience.com/44725-spleen.html
Spleen’s workplace is to the left of your stomach below your rib cage: https://www.livescience.com/44725-spleen.html
Cancer – What Is It?
This piece is based on our video "Your Body Killed Cancer 5 Minutes Ago"
The detailed sources can be found here: https://sites.google.com/view/sources-cancervsimmune/
How Many Friends Can You Handle (According to Science)?
Animated Fact
Are Your Friends More Popular Than You Are?
Animated Fact
Easy explanation by NYTimes:
https://archive.nytimes.com/opinionator.blogs.nytimes.com/2012/09/17/friends-you-can-count-on/
Proofs of different Friendship Paradox claims:
https://www.cse.iitb.ac.in/~soumen/doc/2021_Friends/FriendsOfFriends.pdf
Facebook study on Friendship paradoxes:
https://arxiv.org/pdf/1111.4503.pdf
Happiness Paradox:
How Your Body Fights Against Cancer
This piece is based on our video "Your Body Killed Cancer 5 Minutes Ago"
The detailed sources can be found here: https://sites.google.com/view/sources-cancervsimmune/
How to Make a Kurzgesagt Video (In 1200 Hours)
This piece is based on our video "How to Make a Kurzgesagt Video in 1200 Hours"
Underrated Body Parts That Keep You Alive Part II: Tonsils
Animated Fact
Tonsils Overview: https://my.clevelandclinic.org/health/body/23459-tonsils
Kato, A. et. al. (2014): B lymphocyte lineage cells and the respiratory system. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3628816/
Earth as a Cube – What Would It Look Like?
Animated Fact
What if Earth were a Cube - ScienceABC
Chappell, J. et. al. (2012): The Gravity Field of a Cube. https://thescipub.com/pdf/pisp.2012.50.57.pdf
Berezovsky, J.: If the Earth was a cube, how would gravity be different? https://www.quora.com/If-the-earth-was-a-cube-how-would-gravity-be-different/answer/Jesse-Berezovsky?share=294ba93f&srid=4v6p
Own calculations:
Oceans: Base radius of an ocean-lake: 1100 km, depth at center of the faces: 120 km
https://www.wolframalpha.com/input?i=Volume+of+spherical+cap+with+base+radius+1100+and+height+120
2. "Like climbing a mountain that is 3000 km high"
Take the base radius of the ocean of 1100 km and a cube side length of L = 10,200 km. Then from coast to edge we would have minimal distance of
10,200/2-1100 km = 4000 km
To a corner we would have minimal distance
√2*10,200 km /2 -1100 km ≈ 6112 km
Walking to the edge would than at least be like climbing a mountain with height h, where
h_e = (4000^2-(4000/√2)^2))^(½) = 2828 km
Or when going to the corner at least a mountain with height:
h_c = (6112^2 - (6112/√2)^2))^(½) = 4322 km
Why Are We Doing kurzgesagt?
This piece is based on our video: "How to Make Money on Youtube with 20M Subs"
A detailed article on how we research our videos can be found here: https://medium.com/@Kurzgesagt/how-research-and-factchecking-work-at-kurzgesagt-f5b239188255
How Do Lasers Work?
Animated Fact
Priniciple of a Laser (German): https://www.vitavonni.de/facharbeit/Prinzip_Lasers.html
Physics 2000 on web-archive. Subsection about Lasers: https://web.archive.org/web/20150120033349/http://www.colorado.edu/physics/2000/index.pl?Type=TOC
Who invented the laser?
POV: You're on Your Way Back From the Edge of the Observable Universe
This piece is based on our video: "You Are Not Where You Think You"
The detailed sources can be found here: https://sites.google.com/view/sources-jiggle-of-existence
Magnetic Pole Shift – A Doomsday Scenario?
Animated Fact
Earth's magnetic poles could start to flip. What happens then? https://ec.europa.eu/research-and-innovation/en/horizon-magazine/earths-magnetic-poles-could-start-flip-what-happens-then
Flip Flop. Why variations in Earth's magnetic field aren't causing today's climate change: https://climate.nasa.gov/ask-nasa-climate/3104/flip-flop-why-variations-in-earths-magnetic-field-arent-causing-todays-climate-change/
The Earth's magnetic poles (probably) aren't about to flip, scientists say:
Recurrent ancient geomagnetic field anomalies shed light on future evolution of the South Atlantic Anomaly: https://doi.org/10.1073/pnas.2200749119
Portugal's War on Drugs
This piece is based on our video: "3 Arguments Why Marijuana Should Stay Illegal Reviewed"
Sydow, K. et. al. (2002): What predicts incident use of cannabis and progression to abuse and dependence?: A 4-year prospective examination of risk factors in a community sample of adolescence and young adults. https://www.sciencedirect.com/science/article/abs/pii/S0376871602001023
Portugal's radical drugs policy is working. Why hasn't the wolrd copied it? https://www.theguardian.com/news/2017/dec/05/portugals-radical-drugs-policy-is-working-why-hasnt-the-world-copied-it
Decrease in regular consuption: https://www.drugpolicyfacts.org/region/portugal
Underrated Body Parts That Keep You Alive Part I: Pancreas
Animated Fact
Pancreas Overview: Krebsgesellschaft.de
Pancreatic Cancer Symptoms, Causes, and Treatment: https://www.rxlist.com/pancreatic_cancer_slideshow/article.htm
Slack, J.M.W. (1995). Developmental biology of the pancreas. https://cob.silverchair-cdn.com/cob/content_public/journal/dev/121/6/10.1242_dev.121.6.1569/1/1569.pdf?Expires=1687765182&Signature=FSiVbQbT9xSkynJ7UwUSMJjsL2lo0qqdQJPLcnm5Tk1sO-8Z9eN-VlULLRTF-k2vE7iIomXl4eaUE58x~ksfOr7h-yWWw-B3zKR~Kr14xN~gg0ZJSHaSFg5cxpphOaZWpS68frYKlAL1D28ICmlWbZ1yeb~SpcNwD9pvm2lmlXedg52~er0RKDW5u41LhnwWvNA0zf0LthGhp1QycQZ33wWKoL7~4KZW4l50GDNvYDGo~fs~ajHNyZMRwONL08V7bDNxxdB-kOYMkB7~rk9RSnaiWqATdd1JHYhp3q-SSMtf-fC3gU8-NRAv2WYxrbTdhAwvw55Z1j8GDxOBJtjAgA__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA
Wormholes II: Very Old String Theory Wormholes
This piece is based on our video: "Wormholes Explained – Breaking Spacetime"
Morris, M. et. al. (1988): Wormholes, Time Machines, and the Weak Energy Condition. https://authors.library.caltech.edu/9262/1/MORprl88.pdf
How Tiny Can a Black Hole Be?
Animated Fact
This piece was created based on personal conversations with Prof. M. Caplan.
Aliens Might Already Be on Their Way to Us
This piece is based on our video: "Why Aliens Might Already Be on Their Way to Us"
The detailed sources can be found here: https://sites.google.com/view/sources-grabby-aliens/
POV: You're the Vice President and Aliens Made Contact
Animated Fact
Shanks, G. D. (2016). Lethality of First Contact Dysentery Epidemics on Pacific Islands.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4973171/
Baum, S. D. et. al. (2011). Would Contact with Extraterrestrials Benefit or Harm Humanity? A Scenario Analysis.
https://arxiv.org/pdf/1104.4462.pdf
Holmes, B. (2013). How many uncontacted tribes are left in the world?
https://www.newscientist.com/article/dn24090-how-many-uncontacted-tribes-are-left-in-the-world/
Gilster, P. (2015). The Prime Directive – A Real World Case.
https://www.centauri-dreams.org/2015/08/28/the-prime-directive-a-real-world-case/
Let's Spend the Vacation at the Lake!
This piece is based on our video "The Most Horrible Parasite: Brain Eating Amoeba"
The detailed sources can be found here: https://sites.google.com/view/sources-brain-eater/
The Best Way to Train Your Immune System
This piece is based on our video "The Best Way to Boost Your Immune System (With Science!)"
The detailed sources can be found here: https://sites.google.com/view/sources-whatdoesntkillyoumakes/
How to Perfectly Cut a Sandwich – With Science
Animated Fact
Beyer, W. A.; Zardecki, A. (2004). The Early History of the Ham Sandwich Theorem. https://zenodo.org/record/1235195#.Y8Fv1uzMJeg
Smith, W. D.; Wormald, N. C. (2020). Geometric separator theorems and applications. https://users.monash.edu.au/~nwormald/papers/geomsep.pdf
Su, Francis E., et al. “Ham Sandwich Theorem.” Math Fun Facts. https://www.math.hmc.edu/funfacts
When you think our Sun is big but these exist...
This piece is based on our video: "The Largest Star in the Universe – Size Comparison"
The detailed sources can be found here: https://sites.google.com/view/sourceslargeststar
Behind the Scenes: Our Story, How we Make Money, and our Values
This piece is based on our video: "How to Make Money on YouTube with 20M Subs"
A detailed article on how we research our videos can be found here: https://medium.com/@Kurzgesagt/how-research-and-factchecking-work-at-kurzgesagt-f5b239188255
Why is the Ocean Salty and Rivers are not?
Animated Fact
Why is the ocean salty, but rivers flowing into it are not? https://oceanservice.noaa.gov/facts/riversnotsalty.html#:~:text=About%20the%20same%20tonnage%20of,is%20no%20longer%20getting%20saltier
Why is the ocean salty? https://www.usgs.gov/faqs/why-ocean-salty
What was There Before the Big Bang?
Fully Developed Story
The Origins of the Universe: The Big Bang: https://www.ctc.cam.ac.uk/outreach/origins/big_bang_five.php
What existed before the Big Bang? https://www.bbc.com/future/article/20220105-what-existed-before-the-big-bang
Who Are You?
Garwood, R. & Edgecombe, G. (2011). Early Terrestrial Animals, Evolution, and Uncertainty. https://evolution-outreach.biomedcentral.com/articles/10.1007/s12052-011-0357-y
Millipede from Scotland is world's oldest known land animal: https://www.reuters.com/article/us-science-millipede-idUSKBN2360RD
POV: You Notice a Bright New Star
This piece is based on our video: "What if Earth Got Kicked Out of the Solar System? Rogue Earth"
The detailed sources can be found here: https://sites.google.com/view/sourcesrogueearth
Guided Tour Through the Solar System: The Sun
Animated Fact
This piece was created based on personal conversations with Prof. M. Caplan.
The Beautiful Language of Life
This piece is based on our video: "The Most Complex Language in the World"
The detailed sources can be found here: https://sites.google.com/view/sources-impossible-machines/
Guided Tour Through the Solar System: Minor Members
Animated Fact
Number of small objects: 10 trillion m-to-km sized asteroids in the Main Belt
https://iopscience.iop.org/article/10.1088/0031-8949/2008/T130/014027
100 billion to 1 trillion comets larger than 2 km in the Oort cloud: https://www.lpi.usra.edu/books/CometsII/7031.pdf
10,000 bodies of 100 km in size in the Oort cloud, with a power law of roughly Number = radius^-4. It matches the previous paper (440 billion for 2 km) so leads us to estimate a tremendous 10^4 x 10^20 = 10^24 objects larger than 1m in the Oort cloud. https://www.lpi.usra.edu/books/ssbn2008/7031.pdf
Oort cloud stretches into interstellar space: https://space-facts.com/oort-cloud/
67P asteroid dust with 1 Pa strength: https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/201732155
Chariklo rings: https://sservi.nasa.gov/articles/first-ever-asteroid-with-rings/
Psyche worth:
Blue Phaeton: https://www.space.com/asteroid-phaethon-blue-because-of-sunlight
Arrokoth is the reddest: https://solarsystem.nasa.gov/solar-system/kuiper-belt/arrokoth-2014-mu69/overview/
Comet C/2014 Q2 Lovejoy’s green glow: https://www.science.org/doi/10.1126/sciadv.1500863
Guided Tour Through the Solar System: Pluto
Animated Fact
Methane frost on Pluto: https://www.nature.com/articles/s41467-020-18845-3
Pluto size and orbit: https://nssdc.gsfc.nasa.gov/planetary/factsheet/
The Western portion of Tombaugh Regio (Sputnik Planitia) is 870,000 km2. https://websites.pmc.ucsc.edu/~fnimmo/website/White_Pluto.pdf
Pluto underground ocean: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016GL070694
Cryovolcanoes: https://www.nature.com/articles/s41467-022-29056-3
Tombaugh Regio atmospheric circulation: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019JE006120
Cooking a Chicken with a Particle Accelerator
Fully Developed Story
This piece was created based on personal conversations with Prof. M. Caplan.
Wormholes I: Einstein-Rosen-Bridges
This piece is based on our video: "Wormholes Explained – Breaking Spacetime"
Morris, M. et. al. (1988): Wormholes, Time Machines, and the Weak Energy Condition. https://authors.library.caltech.edu/9262/1/MORprl88.pdf
What Doesn't Kill You Makes You WEAKER
This piece is based on our video: "The Best Way to Boost Your Immune System (With Science)"
The detailed sources can be found here: https://sites.google.com/view/sources-whatdoesntkillyoumakes/
The Ultimate Fight
Fully Developed Story
Resilience of tardigrades:
https://www.nature.com/articles/s41598-017-05796-x
8 Reasons tardigrades are the weirdest, most resilient animals:
https://www.inverse.com/science/tardigrades-weirdest-most-resilient-animals-extreme-life/amp
Tardigrade waking up after 30 years
https://www.sciencedirect.com/science/article/pii/S0011224015300134?via%3Dihub
General info:
https://serc.carleton.edu/microbelife/topics/tardigrade/index.html
Tardigrade walking:
Movies are at the bottom of the page https://www.pnas.org/doi/10.1073/pnas.2107289118
A marine species https://www.youtube.com/watch?v=NKYVpUM1mpQ
Muscles are colored https://youtu.be/33DF5IN2f8A?t=168
Tardigrade footage: https://youtu.be/kux1j1ccsgg
Image gallery:
https://www.inaturalist.org/observations?taxon_id=124337
Different body morphologies:
https://www.researchgate.net/publication/357243465_The_tardigrade_cuticle
Radiation tolerance:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6770827/
Thermotolerance:
https://www.nature.com/articles/s41598-019-56965-z
In the active state: thy start dying around 37 Cdeg and not survive >40 Cdeg
In the anhydrated tun state: they will all die after an hour of exposure to 85 Cdeg. https://pubmed.ncbi.nlm.nih.gov/33014266/
Tardigrade walking speed:
https://www.pnas.org/doi/10.1073/pnas.2107289118
They will survive extreme astrophysical events
https://www.nature.com/articles/s41598-017-05796-x#Abs1
Freezing tardigrades: https://journals.biologists.com/jeb/article/212/6/802/19026/Freeze-tolerance-supercooling-points-and-ice
How does the tun form: https://sun.iwu.edu/~tardisdp/tardigrade_facts.html
Surviving high pressure: https://sci-hub.wf/10.1038/27576
Tardigrades sent to space: https://reader.elsevier.com/reader/sd/pii/S0960982208008051?token=F249807C58F67A082949C4A82FE57F59212FCA7FDC4CA51C4E15808B6683A9FAE1D587570CE550F8E852FA69EA5E6F5D&originRegion=eu-west-1&originCreation=20221130131639
Gamma ray tolerance:
https://sci-hub.wf/10.1080/09553000600972956
https://sci-hub.wf/10.1080/09553000500368453
Ducks can dive up to 60 meters (200 feet):
https://www.allaboutbirds.org/guide/Long-tailed_Duck/overview#
Ducks survive up to 2 weeks without food:
https://poultryace.com/how-long-can-ducks-go-without-food-water/
Terraforming Mars With Lasers
This piece is based on our video: "How to Terraform Mars – WITH LASERS"
The detailed sources can be found here: https://sites.google.com/view/sources-mars-terraforming
How Are There Galaxies Receeding Faster Than Light?
Reaction to user question
Distance at which universe expansion add more than one lightyear: Solve 1 ≤ 0.000000007% * x
How Black Hole Stars Are Formed
This piece is based on our video: "Black Hole Star – The Star That Shouldn't Exist"
The detailed sources can be found here: https://sites.google.com/view/sources-black-hole-star
Dino Calendar 7: Therizinosaurus
Animated Fact
Overview for years/size and diet facts: https://www.geol.umd.edu/~tholtz/dinoappendix/HoltzappendixWinter2011.pdf
Morphological and functional diversity in therizinosaur claws and the implications for theropod claw evolution:
https://royalsocietypublishing.org/doi/10.1098/rspb.2014.0497
The Surprisingly Strong Arms of the Therizinosaur Dinosaurs: https://aapt.scitation.org/doi/abs/10.1119/1.5055323
Choose your Character: Immune Cell Edition
This piece is based on our videos "How the Immune System ACTUALLY Works – IMMUNE"
The detailed sources can be found here: https://sites.google.com/view/sources-immunesystemexplained/
Are We Alone in the Universe?
Fully Developed Story
Definitions of life:
https://www.britannica.com/science/life
Life in our Past:
Ancient Aliens: https://sites.google.com/view/sources-earthaliens/
What Dinosaurs Actually Looked Like: Sources: https://sites.google.com/view/sources-mysteries-of-the-past/
Life in Space:
European Space Agency: The Search for Life. https://www.esa.int/Science_Exploration/Space_Science/COROT/The_search_for_life
NASA Exoplanet Exploration: The Search for Life.
https://exoplanets.nasa.gov/search-for-life/can-we-find-life/
NASA Exoplanet Exploration: Other Skies, Other Suns: The Search for Exoplanet Atmospheres. https://exoplanets.nasa.gov/news/1522/other-skies-other-suns-the-search-for-exoplanet-atmospheres/
MIT Technology Review: No one agrees what it means for a planet to be "habitable". https://www.technologyreview.com/2019/10/02/405/no-one-agrees-what-it-means-for-a-planet-to-be-habitable/
5292 exoplanets confirmed: http://exoplanet.eu/catalog/
ca 400 exoplanets each year: https://exoplanetarchive.ipac.caltech.edu/exoplanetplots/
Scientific sources:
Whitmire, D. & Wright, D. (1980). Nuclear waste spectrum as evidence of technological extraterrestrial civilizations. https://www.sciencedirect.com/science/article/abs/pii/0019103580902535
Tasker, E. et.al. (2017). The language of exoplanet ranking metrics needs to change. https://arxiv.org/pdf/1708.01363.pdf
You Are Cells. But What Are They?
This piece is based on our video "The Most Complex Language in the World"
The detailed sources can be found here: https://sites.google.com/view/sources-impossible-machines/
How Many Moons Can Earth Handle?
Satyal, Suman; Quarles, Billy and Rosario-Franco, Marialis. (2022): Moon-packing around an Earth-mass Planet. https://arxiv.org/pdf/2208.03604.pdf
How many moons could you fit in the sky? https://www.sciencealert.com/how-many-moons-could-you-fit-in-the-sky-the-answer-may-surprise-you
What if there were more moons? http://curious.astro.cornell.edu/about-us/37-our-solar-system/the-moon/the-moon-and-the-earth/38-what-would-happen-if-earth-had-more-than-one-moon-intermediate
Terraform Mars With Me (Part 2)
This piece is based on our video: "How To Terraform Mars – WITH LASERS"
The detailed sources can be found here: https://sites.google.com/view/sources-mars-terraforming
Duck News: Everything is Awful
NASA's Mars rover sends out lonely farewell photo: https://www.chron.com/news/space/article/nasa-mars-lander-last-message-17666295.php
Terraform Mars With Me (Part 1)
This piece is based on our video: "Building a Marsbase is a Horrible Idea: Let's do it!"
The detailed sources can be found here: https://sites.google.com/view/sourcesmars/
POV: You Encounter a Black Hole
This piece is based on our video: "What if You Fall Into a Black Hole?"
The detailed sources can be found here: https://sites.google.com/view/sources-black-holes/
The James Webb Space Telescope
Fully Developed Story
It’s able to … 13 billion years
https://webb.nasa.gov/content/science/firstLight.html
It took more than 20 years and 10 billion dollars …
https://www.businessinsider.com/nasa-spent-billions-launching-james-webb-space-telescope-2022-3
Its 18 mirrors and four instruments collect light in the infrared spectrum.
https://webb.nasa.gov/content/about/faqs/facts.html
Because the universe is expanding, … invisible to the eye.
https://webb.nasa.gov/content/science/firstLight.html
Infrared also passes through dust and gas more easily than visible light. This allows Webb to see objects up to 100 times fainter …
https://www.nasa.gov/content/goddard/hubble-vs-webb-on-the-shoulders-of-a-giant
It could even detect the heat signature of a bumblebee as far away as the Earth is from the Moon.
https://www.cbsnews.com/news/james-webb-space-telescope-fun-facts/
JWST needs to be kept extremely cold, otherwise its own heat radiation would distort its view…
https://webb.nasa.gov/content/observatory/sunshield.html
Webb orbits the sun near the Lagrange L2 point, about 1,5 million km from Earth.
https://webb.nasa.gov/content/about/orbit.html
It has taken beautiful images of the dying “Southern Ring Nebula” and the “cosmic delivery room” inside the Carina nebula, which shows hundreds of stars giving birth.
https://www.mpg.de/18947932/james-webb-telescope-first-images
Surprisingly, … bigger
Nature: Four revelations from the Webb telescope about distant galaxies
… water vapor.
On the gas giant WASP-39b, Webb has found the first clear evidence of CO2 on a planet outside the solar system.
https://www.nasa.gov/feature/goddard/2022/nasa-s-webb-detects-carbon-dioxide-in-exoplanet-atmosphere
These planets are not like Earth because they are either much bigger or hotter.
The technology of Webb is not advanced enough to find Earth-like planets.
Frazer Cain, Astronomy Journalist: “The coronagraph onboard James Webb is able to dim the light from so much that it’s able to see an image of the [very big, Jupiter-like Exoplanet WASP-96b] … To be able to see an Earth-like world orbiting around a Sun-like star at around the distance of the Earth, you need to dim the light by about a factor of [1,000 more than what JWST can today.]” (12:19-12:50)
19 years of near full-time operation
https://www.space.com/james-webb-space-telescope-fuel-20-years
Full time (unlike hubble, which only operates part time):
“Near” full time because sometimes things need to be repaired:
https://www.independent.co.uk/space/webb-telescope-accuracy-calibration-b2195671.html
Guided Tour Through The Solar System: Neptune
Animated Fact
Twin planets:
Neptune is warmer at all depths below the 1 bar level:
https://link.springer.com/article/10.1007/s11214-020-00660-3
Neptune orbit:
https://nssdc.gsfc.nasa.gov/planetary/factsheet/neptunefact.html
Wind speed:
Colour due to wind differences:
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JE007189
Diamond rain:
Iron boiling temperature:
https://www.rsc.org/periodic-table/element/26/iron
Triton geysers:
Let's Visit the Stellar Zoo
Fully Developed Story
This piece was created based on personal conversations with Prof. M. Caplan.
Terraform Venus With Me
This piece is based on our video "How To Terraform Venus (Quickly)".
The detailed sources can be found here: https://sites.google.com/view/sources-terraform-venus/
Colonize the Moon With Me
This piece is based on our video "How We Could Build a Moon Base TODAY – Space Colonization 1"
The detailed sources can be found here: https://www.liebertpub.com/toc/space/4/1
Let's Cook a Galaxy
Animated Fact
This piece was created based on personal conversations with Prof. M. Caplan.
Choose Your Character: Ant Edition
Weaver Ants
https://sites.google.com/view/sourcesweaverants
Army Ants
https://sites.google.com/view/sources-world-war-ants/
Argentine Ants
https://sites.google.com/view/sources-argentine-ants
Slaver Ants
The Most Extreme Explosion in the Universe
This piece is based on our video "The Most Extreme Explosion in the Universe".
The detailed sources can be found here: https://sites.google.com/view/sources-supernovadeath
Where are the Aliens? The Dark Forest Theory
This piece is based on our video "Why We Should NOT Look For Aliens – The Dark Forest".
The detailed sources can be found here: https://sites.google.com/view/sources-darkforest/
Atlantis Existed!
Fully Developed Story
Overview:
Animals:
Last glacial maximum:
Europe's Lost World: The Rediscovery of Doggerland.
https://www.researchgate.net/publication/259639459_Europe's_Lost_World_The_Rediscovery_of_Doggerland
North Sea Archaeologies.
Is There Anything Smaller than a Planck Length?
Reaction to Question
Planck length, minimal length?
The Planck length as a minimal length
http://backreaction.blogspot.com/2012/01/planck-length-as-minimal-length.html
Modern Warfare: Polyergus Ant Edition
This piece is based on our video "The Horror of the Slaver Ant".
The detailed sources can be found here: https://sites.google.com/view/sources-slaver-ants/
POV: You Encounter a Real Monster
This piece is based on our video "The Deadliest Being on Planet Earth – The Bacteriophage"
Lost Galaxies
Animated Fact
Cosmic horizons:
https://explainingscience.org/2021/04/30/cosmic-horizons/
Davis, Tamara & Lineweaver, Charles (2003). Expanding Confusion: common misconceptions of cosmological horizons and the superluminal expansion of the Universe.
https://arxiv.org/abs/astro-ph/0310808
Faster than speed of light recession:
https://arxiv.org/pdf/astro-ph/0011070v2.pdf
Redshift as a doppler effect:
https://lco.global/spacebook/light/redshift/
Galaxies will eventually disappear:
Clearing up misconceptions about the cosmic horizon: