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Ask Dr. Universe Uncategorized

Dr. Universe: In space, which way is up? –Pablo, 10, Spokane, WA

Dear Pablo,

We might not always think about it, but every day gravity keeps us pulled to the Earth. It’s what brings us back down when we jump on a trampoline. It’s why a Slinky tumbles down stairs.

Now think about what it would be like to live in a place with very little gravity. Let’s say you were 200 miles off the ground, orbiting earth in the International Space Station. Here, the idea of up and down really gets flipped around.

On Earth, the human balance system helps the head figure out how move up and … » More …

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Dear Dr. Universe: Why is the map the way it is? - Pablo, Spokane, Wash.

Dear Pablo,

Next time you eat an orange, try getting the peel off in one piece. Next, try to flatten out your peel. You’ll likely find it a bit tricky to make something round perfectly flat.

The same is true when we map our three-dimensional world onto a flat surface. It doesn’t work very well. That’s what I found out when I went to visit my friend Rick Rupp, a Washington State University researcher.

Rupp is an expert on geographic information systems, which can help us capture and analyze the geography of our planet. He explained that maps can show us all kinds of … » More …

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Dear Dr. Universe: HOW DOES WATER IN THE OCEAN MOVE? I THINK IT’S BECAUSE OF THE WIND. –Case, 5, Yakima

Dear Case,

You know, most cats like to stay a comfortable distance from water.

But when I got your science question about our big ocean, I was ready to jump right in.

Ocean water moves in all kinds of ways. Waves curl and crash on the shore. Big conveyer belts of water, currents, flow for thousands of miles around our planet. The tides go out and come back in.

And yes, the wind plays a big part in all of it. That’s what I found out when I went to visit my friend Jeff Vervoort, a … » More …

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How do spiders make silk? And other questions to explore in October

How do spiders make silk?

Spiders can do some amazing things with their sticky, stretchy, and super-strong silk. Us cats are pretty curious about these little silk-spinning machines, too. Besides chasing spiders around, I’ve watched them use silk to build webs, catch bugs, and protect their young spiderlings.Screen Shot 2016-04-04 at 9.05.13 AM

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Do bats have habits?

You are onto something. Quick, to the bat-lab! That’s where I met up with my friend Christine Portfors, a scientist at Washington State University who studies fruit bats.

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Why do … » More …

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