How do whales spray water? Why are humpback whales so fat and blue whales so long, and why are blue whales blue? Do whales have belly buttons? How do you weigh a whale? And how do whales drink water in the salty ocean? We have a whale of a time answering questions about these ocean-dwelling mammals with paleontologist Nick Pyenson, author of Spying on Whales: The Past, Present and Future of Earth's Most Awesome Creatures.

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Why Are Whales So Big?

But Why is a show led by kids. They ask the questions and we find the answers. It’s a big interesting world out there. On But Why, we tackle topics large and small, about nature, words, even the end of the world. Know a kid with a question? Record it with a smartphone. Be sure to include your kid's first name, age, and town and send the recording to questions@butwhykids.org!

Kids & Family

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.

Only two percent of the world’s cockroaches are considered pests. Those are the ones that can live in houses and potentially make us sick. But the vast majority of cockroaches don’t bother humans at all! Some, like the social cockroach species known as termites, work to decompose organic material and are hugely important to our environment. So where do people learn negative attitudes toward insects? 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!

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Why are cockroaches so yucky?

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.

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How do crocodiles chomp?

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.

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Why do ballerinas wear ballet shoes?

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.


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What is a solar eclipse?

Why are there Burmese pythons and chameleons in the Florida Everglades? We might not know how those animals arrived but they are causing damage to the natural ecosystem. An invasive species out competes native plants and animals in an ecosystem. So how does this happen? But Why travels to the Everglades to learn more about how and why species end up in places they shouldn’t. Plus, why are we sometimes told to kill invasive insects like the spotted lanternfly?

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Why Are Whales So Big?

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