Articles on Curious Kids

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Earth, shot from space, as it absorbs and reflects rays of light coming from the Sun - the same white-looking rays that give our sky its colour. NASA

Curious Kids: Why is the sky blue and where does it start?

Some people think the sky is blue because of sunlight reflected off the ocean and back into the sky. But that's not the real reason.
In the beginning, the Universe expanded very, very fast. Flickr/Jamie

Curious Kids: what started the Big Bang?

What caused the Big Bang is still a mystery. And that's just one of the many unanswered questions, in spite of everything we do know about the birth of the Universe.
The edges of your lost tooth are sharp because when the root of the baby tooth is being eaten away, it tends to start from the middle of the root. That leaves a sharp edge behind when the tooth breaks off. Flickr/Stephanie Young

Curious Kids: My tooth fell out. Why is it so spiky on the bottom?

Nicholas, aged 6, was watching TV one day when his tooth fell out. He noticed that the bottom edge of the tooth was very spiky. Now he wants to know why.
Once the coat around the seed is moistened, the embryo cells expand and burst out in a process called germination. shutterstock/NUM LPPHOTO

Curious Kids: how can a tiny seed actually grow into a huge tree?

A seed contains nearly everything a tree needs to get growing. Just add a dash of water, a bit of warmth and the right location, and you'll be seeing green in no time.
Singing helps us remember information. Flickr/Martin Abegglen

Curious Kids: Who made the alphabet song?

Because of the way our brains work, we can remember songs and rhymes much more easily than just words or letters. The ABC song teaches kids the basics of the English language.
A shark’s nose is chemosensory only, and it doesn’t join up to the back of the throat like ours does. Flickr/Leszek Leszczynski

Curious Kids: Do sharks sneeze?

Sharks can't sneeze like we do, but they can do other cool tricks -- like making their stomach stick out of their mouth to get rid of unwanted stuff.
Did Puss in Boots have it all wrong? Flickr/zaimoku_woodpile

Curious Kids: Why don’t cats wear shoes?

Cats evolved in hot desert regions where there were lots of small animals to eat. So they evolved feet that are perfect for pouncing on prey, climbing, scratching and jumping from great heights.
The truth is we don’t really know if space goes on forever – but maybe, one day, we will find out. Sweetie187/flickr

Curious Kids: Does space go on forever?

People used to think that when they looked up at the night sky, they were seeing all of space. Then American astronomer Edwin Hubble found out something so amazing, NASA named a telescope after him.

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