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DNA: Extract it!

What is Dr. Universe’s favorite experiment? -Garrett, 8th grade, Eastern Washington

Dear Garrett,

You know, your question reminds me of a couple other science questions from curious readers. Evangeline, age 7, wants to know why her hair is black. Sureya, age 8, wants to know why some people have curly hair.

It just so happens that one of my favorite science projects explores our questions about what makes us unique. It has to do with our DNA, or the blueprint for life. » More …

How do chameleons change color?

Dear Dr. Universe, How does a chameleon change colors? -Jasmine B. 12, Nepean, Canada & Marie F., 11, Ghana

Dear Jasmine and Marie,

There’s something about a chameleon’s darting eyes, long tongue, curled tail, and ability to climb that makes it a fascinating animal to watch. Especially when it’s changing colors.

And the latest research on your question suggests that how a chameleon changes has more to do with light than scientists once thought. » More …

Why is yawning contagious?

Why is yawning contagious? -Grant, 10, Pullman, WA

Dear Grant,

When I got your question, I met up with my friend Hans Van Dongen, a scientist at Washington State University in Spokane. He works in a research lab where they study sleep. As a cat who appreciates naps, it’s one of my favorite places to visit. » More …

Why do bees make hexagons?

Why do bees make hexagons in their hives? Why not any other shape? -Aditya, 10, New Delhi, India

Dear Aditya,

When bees make hexagons in their hives, the six-sided shapes fit together perfectly. In fact, we’ve actually never seen bees make any other shape. That’s what I found out when I visited my friend Sue Cobey, a bee researcher at Washington State University.

Cobey showed me some honeycombs where the female bees live and work. Hexagons are useful shapes. They can hold the queen bee’s eggs and store the pollen and honey the worker bees bring to the hive.Dr.UBees

When you think about it, making circles wouldn’t work too well. It would leave gaps in the honeycomb. The worker bees could use triangles or squares for storage. Those wouldn’t leave gaps. But the hexagon is the strongest, most useful shape. » More …

Are animal and human bones the same?

Dear Dr. Universe, Do animals have the same types of bones and muscles as humans? -Lydia, 8

Dear Lydia,

The short answer is yes, said my friend Leslie Sprunger, a veterinarian and professor in the College of Veterinary Medicine at Washington State University. But, as always, there’s a catch. » More …

Do animals dream?

Dear Dr. Universe, Please answer this question: Do animals dream? What dreams do they get? I humbly request you to answer these questions. BYE! Or should I say MEOWY! -Prahlad R.

Dear Prahlad,

After a quick catnap and a stretch, I went to visit my friend Marcos Frank, a scientist at Washington State University who studies animal sleep.

» More …

How do mollusks move around the ocean?

If mollusks have such heavy shells to drag around with them, how have they spread all over the ocean? -Michel W.

Dear Michel,

Mollusks, from land snails and slugs to oysters and mussels in the sea, have a few things in common. They have a head. They have a soft middle part that holds their organs. Then, some have a muscle that’s known as a “foot.” » More …