Can’t get enough of lizards? We’re back with a bonus episode answering more of your lizard questions with Adam Clause of the San Diego Natural History Museum. This week, chameleons, Komodo dragons, iguanas, monitor lizards and tuatara! How do chameleons change color? Why are Komodo dragons called dragons and are they endangered? How many babies do monitor lizards have? Why do iguanas have dewlaps? (And what’s a dewlap?!) Why are iguanas green? What is a tuatara?

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Deep in the basement of the San Diego Natural History Museum, there are thousands of jars filled with preserved reptiles and amphibians. In this episode, But Why takes a tour with collections manager Adam Clause to answer your questions about lizards! How do lizards climb walls? Do lizards hibernate? Do they sleep? Why are lizards cold blooded? How do lizards grow back their tails if they break off? Why do geckos lick their eyes? Do lizards poop and pee?

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But Why turns ten years old on April 1, 2026! To celebrate this milestone, we’re listening back to our very first episode. We’ve got owls and turtles and bears. Naturalist Mary Holland gets into the details about hibernation–including the questions you may not even have thought to ask, like what about poop? Then we meet a barred owl named Chapin, who is cared for by Outreach for Earth Stewardship in Shelburne, Vermont.

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Download and print Hibernating Bear and "Om Nom" Bear, coloring pages by Lauren Turmel.