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Articles on Curious Kids

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From red, to blue, to purple, to yellow and even green – why do our bruises change colour? From shutterstock.com

Curious Kids: why do we get bruises?

When you hurt yourself, tiny blood vessels can break under the skin. The blood that oozes out is what gives a bruise its colour.
Young Americans today are more likely to say that they’re dissatisfied with the current state of affairs. LightField Studios/Shutterstock.com

Why are kids today less patriotic?

A teen asks why so many young people don’t stand for the Pledge of Allegiance or the national anthem. The data shows that young Americans today do view the U.S. more negatively than older generations.
If you’ve ever put wet wood on to a fire, you may have noticed it makes a lot more noise than dry wood. Shutterstock

Curious Kids: why does wood crackle in a fire?

Water and sap inside the wood make mini explosions as they turn into gas and burst out. That’s why damp wood makes the noisiest fires.
Blood has special traits unique to every person. TippaPatt/www.shutterstock.com

What are blood types?

Every person’s blood is identified by type. Why does this matter?
Could an alien world look like this? Shutterstock

Curious Kids: What would aliens be like?

Somewhere out there, just maybe, an alien – probably stranger looking than in our wildest imagination – might be pondering this very question.
The Ringtail Unicornfish, which occurs in tropical marine waters of the Indo-Pacific. All fish sleep, even the weird-looking ones. Bernard Spragg/Flickr

Curious Kids: how do fish sleep?

Fish may not have eyelids to close, but they sleep – and perhaps even dream.

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