Articles on Curious Kids

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Scientists built a small database showing which animals do and don’t fart. Not every animal in the world is on there, but it does have moon snails listed as a no. Flickr/Florida Fish and Wildlife

Curious Kids: can snails fart?

One thing I can tell you is that a snail's bottom is right over its head.
The short answer is that leaves fall off trees when they aren’t doing their job any more. Emily Nunell/The Conversation CC-NY-BD

Curious Kids: why do leaves fall off trees?

Leaves fall off trees when they aren’t doing their job any more. If there isn’t enough water, the leaf can be damaged and stop working.
It’s true they do have an amazing ability to be able to sleep standing up. But they do also sleep lying down. If you’re a horse, you need to be able to do both. Flickr/Loco Steve

Curious Kids: why don’t horses sit or lie down even while sleeping?

Horses can stand on three legs and rest the other leg. They can change the leg they rest so that all of their legs get a chance to have a break.
A brain freeze is an intense ‘squeezing’ sensation on your head. Nina Maile Gordon/The Conversation

Curious Kids: what is brain freeze?

There are several different science ideas around why, but the answer may have something to do with what happens when we cool down the roof of our mouth.
The experience that babies get from eavesdropping on their mother’s conversations in utero helps their brain tune into the language that they will learn to speak once they are born. Emily Nunnell/The Conversation CC-BY-ND

Curious Kids: how do babies learn to talk?

Using a sing song voice helps babies tell the difference between words like 'mummy' or 'daddy'.
Here’s a close-up picture of a head louse. The eggs of the female head louse are what we call ‘nits’.

Curious Kids: what’s the point of nits?!

We like to think that all creatures play a role in the local ecosystem. We're especially interested in insects that provide a benefit for people too. But that's not always how it is.
Yolks are a great source of vitamins, minerals, fats and proteins packaged up by the female animal for an embryo. Emily Nunell/The Conversation CC-NY-BD

Curious Kids: why do eggs have a yolk?

A yolk allows a developing animal to stay in an egg longer, boosting its chance of survival. The downside is the mother has to work hard finding extra food so her body can create a nutritious yolk.
The sea is blue because of the way water absorbs light, the way particles in the water scatter light, and also because some of the blue light from the sky is reflected. Flickr/Fiona Paton

Curious Kids: is water blue or is it just reflecting off the sky?

Photons stream from the sun and interact with all matter on Earth. Depending on what the light touches, some of the photons will get absorbed or soaked up. And some will bounce back.
In the very beginning of the Roman calendar (more than 2000 years ago), there were only 10 months in the year. Jule Berlin/Shutterstock

Curious Kids: how did the months get their names?

December is named for the Roman word for "tenth". So, why is it the twelfth month?
Tigers have whisker hairs even on their front legs and chin! thedigme/flickr

Curious Kids: why do tigers have whiskers?

Whiskers are not just ordinary hairs. They are thicker and go deeper into the tiger's skin and send messages to its brain about what is happening in the world around it.

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