Exploring the science and different types of laughter, including contagious laughter, nervous laughter, and alien laughter. A game show segment called Laugh Attack tests knowledge on laughter. Mystery sound guessing game and shoutout to young contributors add fun elements to the episode.

Learn how satellites work as Molly and her co-hosts delve into satellite solar panels, thrusters, and radio waves. Dr. Moriba Jah explains space junk hazards. Don't miss the mystery sound reveal and explore the importance of keeping space clean!

Join Anna and Rosie as they play a new game called Tooth or Dare, with alluring flute music and a lively narrative. Learn about the perks of subscribing to Smartypast for ad-free feeds, bonus episodes, and exciting prizes.

Learn about the science behind matches, including the 'fire triangle' and chemical reactions. Explore the history of matches from ancient methods to modern inventions. Uncover a mystery sound and connect with listeners worldwide. Discover how matches create fire in a fast and fascinating way.

Molly and Leon dive into the world of sand at the beach, chatting with sand expert Stan and discussing why beaches are losing sand. They explore the depth of sand, its origins, and the impact of human activities on beach sand. Listen for a new mystery sound and learn why sand is a valuable, depleting resource.

Dr. Daniel Kohen, a pediatrician and hypnosis expert, discusses the truth about hypnosis and its power to heal. They debunk misconceptions and clarify that it isn't mind control. Joshua, a 13-year-old, shares his experience using hypnosis to overcome anxiety. The podcast explores the concept of suggestibility in hypnosis, the benefits of hypnosis, and the effects it has on the brain, including its ability to reduce pain perception.

Join Molly and Aya on a toothy adventure as they explore what causes cavities and how dentists fix them. They discuss the importance of teeth, the connection between mouth bacteria and cavities, and the structure of teeth. They also talk about creating the toothbrush of our dreams and reveal the answer to a mystery sound.

Producers Rosie duPont and Aron Woldeslassie visit the Brains On petting zoo and play a round of Baby Mystery Sounds with cute baby animals. Learn about Smarty Pass, a subscription for Super Fans that offers an ad-free feed of all shows and includes bonus games.

James Frond, international fern of mystery, discusses how ferns survived the dinosaur extinction. They explore fern characteristics, resilience, and their ability to regrow after extinction events. Listeners guess sounds, design future toothbrushes, and learn about fern's unique survival mechanisms. Scientists study ferns to understand climate adaptation. Kids' contributions are celebrated, and a sneak peek into the next episode on cavities is provided.

Archaeologist and Brains On producer Anna Goldfield joins the hosts to uncover the truth about Neanderthals. They discuss the initial misunderstandings, similarities, and differences between Homo Neanderthalensis and Homo sapiens. The chapter explores advancements in archaeology, including insights into Neanderthals' diet, society, and possible extinction reasons. The hosts also share their vision for a futuristic toothbrush and thank contributors.