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Where is the border between sky and space? What about between sky and land? And why we can't hold air? The answers to these questions are scientific but it turns out they’re also philosophical and a little bit mysterious! In this episode from 2020, we’re joined by anthropologist Hugh Raffles, an author and professor at The New School, and astronomer John O'Meara, chief scientist at the Keck Observatory. And we have special scoring by cellist Zoë Keating.

That’s a question a lot of people have, honestly. But a kid named Rosie was bold enough to ask us to investigate why. So, in the latest episode, we dig in on why cockroaches get such a bad rap and why you might want to reconsider if you’re not a fan.We dig deep into insects with Jessica Ware, an entomologist and curator at the American Museum of Natural History. She’s also the host of the PBS digital series Insectarium. Answers to your questions about cockroaches, termites, dragonflies, praying mantises and more!

Why do lizards have scales? Why are reptiles cold-blooded? Why do lizards have long tongues? How do lizards grow their tails back? Are crocodiles dinosaurs? What’s the difference between an alligator and a crocodile? Why do crocodile eyes look like they have mirrors in the back? How do crocodiles chomp? Why do crocodile teeth stay sharp? Why are crocodiles green? Why do crocodiles swim? Answers to all of your crocodile and alligator questions with Venetia Briggs-Gonzalez, one of the researchers known as the Croc Docs at the University of Florida.

Why do people dance? Where did ballet come from? How do you make pointe shoes for ballet? How does practice make you better at things? But Why visited Dance Theatre of Harlem to get answers to these questions with company artists Derek Brockington and Lindsey Donnell.

A solar eclipse is coming to North America on April 8, 2024. The moon will line up perfectly between the earth and the sun, blocking out the sun’s light and casting a shadow that will pass over parts of Mexico, the United States and Canada. People in the path of totality will experience a few minutes of darkness during the day as the moon perfectly covers the sun. Those not in the path of totality in those countries will still experience a partial solar eclipse. In this episode, we’re answering questions about the eclipse and talking about how to keep your eyes safe if you’re watching it! We speak with Bridgewater State University solar physicist Martina Arndt, Fairbanks Museum planetarium director Mark Breen and Thomas A. Hockey, author of America’s First Eclipse Chasers.