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How are ants so strong?

Dear Dr. Universe: I would like to find out how ants are so strong. How is it possible that they can carry weight that is heavier than themselves?

–Anita, 11

Dear Anita,

Ants are pretty good little weightlifters. My friend Rich Zack, a scientist at Washington State University who studies insects, knows a lot about ants. One kind of ant that he has studied can carry up to 20 times its own weight. » More …

What do astronauts eat in space?

What do astronauts eat in space?

–Rhemi, 12, St. Louis, Mo.

Dear Rhemi,

Astronauts eat all kinds of different foods up in space. The food is often similar to what we have here on Earth. But in space, there’s very little gravity. There’s very limited refrigeration, too. On the International Space Station, the refrigerator is only about half the size of a microwave. That means scientists who prepare and package astronaut food have to do it in ways that take up very little room and don’t need to be kept cold. » More …

Why do we have feelings?

Why do we have different feelings?

– Charan and Aishwarya V., 10 & 8, Rutherford, New Jersey

Dear Charan and Aishwarya,

Imagine you are playing a game of soccer and your best friend is on the opposing team. The sun is out, you are having a great time, and you score the winning goal. You’d probably feel pretty happy and so would your team. » More …

How do turtles live so much longer than other animals?

How do turtles live so much longer than other animals?

-8th grader, Lewiston, Idaho

Dear Reader,

You’re right, turtles and tortoises live a lot longer than most other animals. If you were a turtle, you might live for more than 150 years. One giant Galápagos tortoise named Harriet even lived to be more than 170 years old, said my friend Donna Holmes. » More …