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Why do animals hibernate?

Dear Dr. Universe: Why do animals hibernate? -Jarrett T., 10, Edinburgh, IN

Dear Jarrett,

Animals can get through winter in all kinds of ways. Us cats like to curl up on a cozy couch. Some penguins huddle in groups to create heat. A lot of birds fly south to warmer weather. Perhaps you put on mittens and a coat. » More …

How do we digest?

Dear Dr. Universe: How does digestion work? -Abi, 12, U.S., Megha R., 11, Dubai

Dear Abi and Megha,

All around the world, animals are eating all kinds of different foods. Our foods might be different, but one thing is true for all of us: We have to digest. » More …

Why do we get scared?

Dear Dr. Universe: Why do we find some things scary? -Jack H., 8, UK 

Dear Jack,

While our fears might be different, we all get scared sometimes. Vacuums, dogs, and even cucumbers make my hair stand on end. Perhaps for you it’s spiders, the dark, or the thought of monsters under your bed.

My friend Michael Delahoyde is really curious about what freaks us out. As an English professor at Washington State University, he’s even taught a course about monsters. » More …