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How does my family car work?

Dear Dr. Universe: I want to know how my family car works. How does the gas reach the engine and go? How does the steering wheel make the car turn and how do the brakes help us to stop? -Jordan, 6, Queens, New York 

Dear Jordan,

As a cat, car rides can sometimes make me feisty. But as a scientist, it’s fascinating to learn about the mechanics, engineering, and chemistry fueling the cars humans drive every day.
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What happens under a volcano?

What happens under a volcano? -Graylon W., 6, Milton, Ontario

Dear Graylon,

Your question takes us on a journey deep into the Earth. Figuratively speaking, of course. It’s really hot under Earth’s surface. It’s so hot it can melt rock. This melted rock is known as magma. And anything that erupts magma is a volcano. » More …