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Description
Description
2025 - 2026 Theme
Headline: The green past of the Saharo-Arabian Desert: Cave deposits reveal recurring humid periods over eight million years
Background: A new study led by the Max Planck Institute for Chemistry has uncovered compelling evidence that the Saharo-Arabian Desert—today one of Earth’s driest regions—experienced multiple periods of significantly wetter climate over the past eight million years. Researchers analyzed speleothems, or cave deposits, from seven Saudi Arabian caves and found chemical clues indicating repeated monsoonal rainfall that transformed the desert into a habitable landscape for thousands of years at a time.
These wetter intervals likely enabled the migration of mammals, including early human ancestors, between Africa and Eurasia—despite the desert’s role as a natural barrier. The study highlights the powerful influence of climate change on human and animal history, as well as the importance of cave formations as records of ancient weather patterns. Using isotopic analysis and radiometric dating, the team also discovered that the decline of monsoonal rainfall was caused by long-term cooling in the Northern Hemisphere, which shifted rain belts southward.
Prompt: Based on the following headline, develop a news broadcast that includes an introduction of the headline, a summary of the information in the news story, and an explanation of potential future implications of the highlighted work.
What to Know?
What to Know?
How to use audio editing and recording tools
How to use audio editing and recording tools
Free tools like Audacity, Ocenaudio, and TwistedWave are perfect for beginners. They help you record, layer sounds, cut unwanted parts, and apply effects like fade-in/out. Being able to export your project as an MP3 is essential.
Basic voice acting and storytelling skills
Basic voice acting and storytelling skills
Your voice is the main instrument, so use it with intention! Practice tone, pace, and expression to keep your podcast interesting. Write a clear script or outline with a beginning, middle, and end to stay organized and hit your key points.
Understanding of sound design and foley
Understanding of sound design and foley
Sound effects and background audio create atmosphere. Learn how to find and use royalty-free or public domain sounds, and use them sparingly to boost your story without overwhelming it. Make sure everything used is credited in your portfolio.
Documenting your process
Documenting your process
You’ll submit a PDF portfolio alongside your audio. This includes your timeline, tools used, sources, and reflections. Keep notes during your process to make this step easier later.
What to Submit?
What to Submit?
Audio Podcast
Audio Podcast
Format: MP3 (uploaded via public URL—no logins or downloads required)
Length: Between 1 and 5 minutes
5-point penalty for every 15 seconds over or under
Content: Must be your team’s original work, created during the school year
Allowed to use first names only (no last names, school, or state)
External sounds must be royalty-free and cited
Documentation Portfolio
Documentation Portfolio
Title Page (podcast name, TSA event, Chapter ID, city/state, year)
Table of Contents
Podcast Cover Art
JPEG or PNG
1400 x 1400 px, square ratio
Work Log
Self-Evaluation (based on official judging criteria)
Audio Composition Timeline (graphical layout of sounds and voice clips)
Source List for Non-Original Audio (where it came from, how it was used)
List of Tools Used (software, hardware, microphones, etc.)
References Page (for any external resources)
Student Copyright Checklist
Tools & Resources
Tools & Resources
Audio Editing & Recording
Audio Editing & Recording
Clipchamp – Microsoft’s free in-browser video/audio editor (easy to use for cutting and layering audio clips)
Audacity – Industry-standard free audio editor
Ocenaudio – Simpler alternative to Audacity
TwistedWave Online – Record/edit directly in browser
Royalty-Free Sound Effects & Music
Royalty-Free Sound Effects & Music
Freesound – Community-submitted sound effects
Free Music Archive – Background music for non-commercial use
Pixabay Music – High-quality music for podcasts and videos
Hosting & Sharing Audio Files
Hosting & Sharing Audio Files
Google Drive – Be sure to share as “Anyone with the link”
Dropbox – Alternative for storing and sharing
YouTube (Unlisted) – Upload audio as a video with cover art
Helpful Terminology
Helpful Terminology
Voice Acting: Using tone, pitch, and expression to bring a script to life
Foley: Sound effects added to mimic real-life audio (e.g., footsteps, doors)
Compression: An audio effect that balances volume levels so that loud and quiet parts are more consistent.
Normalization: Boosts or lowers the overall volume to a standard level without distorting the audio.
Royalty-Free: Media (like music or sound effects) that can be used legally without paying ongoing fees. Must still be cited if required.
Mono vs. Stereo: Mono means one audio channel (same sound in both ears), stereo uses two (left/right separation). Podcasts are typically stereo.
Peak/Clipping: Distortion caused when your audio is too loud and exceeds the maximum recording level.
Ambient Sound: Background sounds that set a location or mood (e.g., rain, traffic, birds chirping).
Mixing: Adjusting and balancing the volume levels of voice, music, and effects in your podcast.
Mastering: The final step in editing where you polish your audio—adjust volume, EQ, and effects for a clean result.
EQ (Equalization): Adjusting specific frequencies (bass, mids, treble) to enhance clarity or warmth of a sound.
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