Where is the deepest part of the ocean, and have we been there in person? Ocean explorer Gaelin Rosenwaks answers with an amazing story of the first explorers to dive to a mysterious place called Challenger Deep. It's filled with awesome adventure, incredible risk, and awe-inspiring reward. This is a journey that changed the way we understand the ocean. We're working on a bunch of exciting new stuff for you this week, so we are re-playing one of our favorite episodes.  Love Tumble? Subscribe on iTunes! itunes.apple.com/us/podcast/the-t…cast/id984771479 and write us a review. Support us on Patreon! www.patreon.com/tumblepodcast And visit us on our website,www.sciencepodcastforkids.com

Why do batteries - even rechargeable ones - die? What if there was a battery that lasted forever? Mya Le Thai, a young scientist, was sick of recharging her phone. So she set out make make a longer lasting battery. What she created was better than she had ever thought possible - a battery that won’t die. It lasts 100 times longer than the typical phone battery. Find out what goes on inside a battery, and how Mya came to her eureka moment. Tell us what you would do with a battery that lasts forever! Email us at [email protected] Subscribe on iTunes! itunes.apple.com/us/podcast/the-tumble-podcast/id984771479 Support us on Patreon! https://www.patreon.com/tumblepodcast And visit us on our website, www.sciencepodcastforkids.com

Why are there so many different species of ants? That’s what entomologist Corrie Moreau wants to know. There are more species of ants than there are species of mammals and birds - combined! Her quest starts in the jungle and ends in a lab, where she unravels the story of ants conquering the earth. Plus, listeners tell us what THEY know about ants! Take Corrie’s advice: Get outside and play with bugs! Then tell us about it. What did you see and observe? Take photos and make drawings. Email them to us at [email protected] Subscribe on iTunes! itunes.apple.com/us/podcast/the-tumble-podcast/id984771479 Support us on Patreon! https://www.patreon.com/tumblepodcast And visit us on our website, www.sciencepodcastforkids.com Photo from Wikipedia

Are cats evil, or just misunderstood? That's what our friends at Brains On debate for a panel of kid judges. Find out what they decide in this special guest episode! Plus, Lindsay and Marshall weigh in on their conclusions.  What do you want to know about cats? Let us know on our Facebook or Twitter pages, or email us at [email protected]. Support Tumble on Patreon, and you can have your name read on the show (and get more great stuff!) Pledge at patreon.com/tumblepodcast. Subscribe on iTunes and leave us a review! itunes.apple.com/us/podcast/the-tumble-podcast/id984771479

Why do fireflies flash their lights on and off, on and off? That’s what four curious kids want to know. Biologist Sara Lewis has studied fireflies for decades, and she’s cracked the code of their spectacular light displays. She explains why fireflies light up at night with a story of an undercover experiment. Sara tells us how she “spoke firefly” and learned that female fireflies are surprisingly hard to please. To learn more about fireflies, see Sara’s website and book at www.silentsparks.com. We're proud that Tumble is a free podcast! But we need your support to keep it going and growing. We’ve launched a Patreon campaign to offer you awesome rewards in exchange for a monthly pledge! Find out what our next episode is about in advance, get notified of opportunities to be on the show, receive exclusive educational content and so much more. Find the link on our website, www.tumblepodcast.com. Subscribe and review Tumble on iTunes, like us on Facebook, and follow us on Twitter. We want to hear from you at [email protected]. Firefly photo by Terry Priest used with permission from Sara Lewis.

We have a short and sweet summer episode for you! Charles Darwin is known as the father of evolution, but he got his start as a naturalist as a young man. He took an ambitious five year journey around the year, studying thousands of species of plants and animals. Many years after his return to England, he wrote The Origin of Species, one of the most famous and influential scientific books ever written.  Áki Jarl Láruson tells the story, at a meeting of evolutionary biologists in Austin, Texas.   Learn more at tumblepodcast.com   Have you answered our listener survey? Help shape the future of Tumble at bit.ly/tumblesurvey    Subscribe on iTunes or your favorite podcatcher! Like us on Facebook, and follow us on Twitter!

The Great Pacific Garbage Patch is a vast, swirling soup of trash, twice the size of Texas. Can we ever clean it up? That’s what 8 year old Ila wants to know. She lives in Hawaii and likes to pick up trash whenever she goes to the beach. She lives closer to the garbage patch than most of us. We talk to Jenni Brandon, a researcher who has been to the Great Pacific Garbage Patch - a place where few people will visit, but where we all have an impact. She tells us how surreal it is to sail through trash, why the garbage patch exists, and what scientists are doing about it. To find out more, visit tumblepodcast.com Marine debris photo courtesy of Jenni Brandon.

What are invisibility cloaks made of, and when can we buy them in gift shops? That's right, invisibility cloaks are not just for wizards anymore. We get into the very real science of invisibility with Dr. Andrea Alu. Dr. Alu is one of the leading scientists working on "cloaking." We learn how scientists are playing with the laws of physics and optics to turn fantasy into scientific reality.  Have a question for Tumble? Send us a recording with your name, age, question, what you think the answer is, and how scientists might find out. Email it to [email protected]! If you love Tumble, support us by writing a review on iTunes or donating on our website. For more about Kids Listen, a new awesome organization for kids podcasts, visit kidslisten.org.

Where is the deepest part of the ocean, and have we been there in person? Ocean explorer Gaelin Rosenwaks answers with an amazing story of the first explorers to dive to a mysterious place called Challenger Deep. It's filled with awesome adventure, incredible risk, and awe-inspiring reward. This is a journey that changed the way we understand the ocean. Love Tumble? Leave us a review on iTunes! Want to be on the show? Send us a question! Record yourself asking the question, and tell us what you think the answer is and how scientists might find the answer. Would you support Tumble? Donate on our website, www.tumblepodcast.com.

How do black holes work? And how do we learn about them, if they're impossible to see? We talk to Dr. Karl Gebhardt, who has helped discover over half of the black holes that astronomers have ever found. Light cannot escape from a black hole, which means that they are impossible to see. We find out the secret to finding black holes, and how what happens inside might explain mysteries of gravity. Astronomy adventures are ahead in this episode!    Music in this episode is by Secret Agent 23 Skidoo from his upcoming album, Infinity Plus One.   Ask us a question, listen to more episodes, and donate at tumblepodcast.com. Subscribe to Tumble Science Podcast for Kids and review on iTunes. Follow on Facebook and Twitter. Thanks for listening!