Sleep is your life-support system and Mother Nature's best effort yet at immortality, says sleep scientist Matt Walker. In this deep dive into the science of slumber, Walker shares the wonderfully good things that happen when you get sleep -- and the alarmingly bad things that happen when you don't, for both your brain and body. Learn more about sleep's impact on your learning, memory, immune system and even your genetic code -- as well as some helpful tips for getting some shut-eye.

Matt Walker's research examines the impact of sleep on human health and disease. He got his PhD from the Medical Research Council in London, UK, and subsequently became a Professor of Psychiatry at Harvard Medical School. He's currently a Professor of Neuroscience and Psychology at the University of California, Berkeley, and Director of the Center for Human Sleep Science.

Today, Matthew Lillard eats his last meal.

What would your last meal be? Join Mythical Chef Josh and celebrity guests as they dig into their ultimate last meal, sharing surprising tastes, personal memories, and culinary stories.

Josh Scherer is an American chef and internet personality who is best known as the host of the YouTube channel Mythical Kitchen. Prior to hosting Mythical Kitchen, he was also the culinary producer for the YouTube web series Good Mythical Morning.

What if the key to saving nature isn't just about science or policy, but love? Love for the land, for the people who depend on it, for the world we leave behind. Artist Elsaphan Njora has journeyed across Kenya witnessing ecosystems vanish, from Indigenous forests to sacred lakes. But he's also seen communities breathing life back into rivers, forests and coasts in creative, unexpected ways — showing that conservation can flourish alongside livelihoods, and that even the most threatened landscapes can be reborn. (Recorded at TED Countdown Summit 2025 on June 17, 2025)

Elsaphan Njora is a multi-talented Kenyan artist who is known for his acting and spoken word.  He founded EOPNATION; a spoken word event that was held in Nairobi every third Friday of the month for over 9 years and HOMECOMING; a multi character, multidisciplinary, minimalist living room performance that is based on THE ZAPHAN GENRE OF PLAY. 

These are a series of podcasts made up of the sounds of nature. The person who makes them, Lang, also talks in them, but I personally like the ambiance more.

I think they're very calming. I don't really care for most podcasts, as I just cannot get interested in them, but I like the sounds of nature in this. They're also designed to be 3D when wearing headphones, making them very immersive. I recommend the Autumn Trek episode.