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Articles on Curious Kids

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Allium schoenoprasum, better known as chives. Andreas Rockstein/Flickr

Why do plants grow straight?

Plants need light to feed themselves, so they grow in ways that help them collect as much of it as they can. Sometimes that’s straight up, but not always.
Most candy is basically just a heap of sugar. Atlantide Phototravel/Corbis Documentary via Getty Images

How much candy do Americans eat in a whole year?

A healthy diet can include some candy. But if you eat too much, it can interfere with your appetite for the stuff your body actually needs.
Lava flows from a fissure in the aftermath of eruptions from the Kilauea volcano on Hawaii’s Big Island, May 22, 2018. Andrew Richard Hara/Ena Media Hawaii via Getty Images

Why can’t we throw all our trash into a volcano and burn it up?

Volcanoes might seem like nature’s incinerators, but using them to burn up trash would be dangerous and disrespectful to indigenous people who view them as sacred.
Brown poop can indicate good health. Vitalii Barida/iStock via Getty Images Plus

Why is my poop brown?

The answer is more complicated than you might think. It has to do with how your body gets rid of old red blood cells.
For almost as long as there have been computers, there have been video games. Neilson Barnard/Getty Images

Who invented video games?

Video games are everywhere. So who was the first person to come up with the idea of playing a game on a computer screen?
An illustration shows how, about 65 million years ago, a large asteroid collided with Earth. It hit what is today Mexico and created the Chicxulub crater. Mark Garlick/Science Photo Library/Getty Images

Curious Kids: Why are there so few impact craters on Earth?

Impact craters are relatively shallow, so these bowl-shaped “dents” in Earth’s rocky crust can be easily buried or erased by erosion.
A dairy barn in Waitsfield, Vermont, built circa 1890. Thomas Visser

Why are barns painted red?

Barns are practical buildings, designed to safeguard farm animals and equipment. Why are so many of them painted to stand out from the landscape?
It only takes light about eight minutes to go from the Sun to Earth. loops7/E+ via Getty Images

Have we made an object that could travel 1% the speed of light?

The fastest things ever made by humans are spacecraft, and the fastest spacecraft reached 330,000 mph – only 0.05% the speed of light. But there are ways to go faster.

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