Articles on Curious Kids

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Lasers being shone from the European Southern Observatory’s Very Large Telescope in Chile. These lasers help remove the twinkles in the night sky and help astronomers see stars clearer on Earth than ever before. F. Kamphues/ESO

Curious Kids: Why do stars twinkle?

How exactly do the stars twinkle in the night sky? As it turns out, the answer is full of hot air... and cold air.
Nature gave us ten fingers, so it makes sense to count to ten. But what happens when we run out of fingers? Flickr/Bethan

Curious Kids: Why do we count to 10?

Why are there 60 minutes in an hour, and not 10? Why do we count up to 10, anyway? Quentin, age five, wants to know.
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.

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