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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 …

Stars: What color are they?

Dear Dr. Universe: What color are our stars? -Mira, 8, Ontario 

Dear Mira,

Just the other night, I grabbed my binoculars and looked up to the starry sky. At first the stars looked white, but when I looked closer I noticed some appeared more blue and red. » 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 …

Volcanoes on other planets?

Dear Dr. Universe: I was just wondering if there are any volcanoes on any other planets? -Danny, 10, Kenmore, WA

 

Dear Danny,

The answer to your question takes us out into our solar system and deep below the surfaces of other moons and planets. » More …