The diameter of the Milky Way is a billion billion kilometres.
One thing I can tell you is that a snail's bottom is right over its head.
It's hard to believe, but big storms and hurricanes are caused by tiny particles moving around in the atmosphere.
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.
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.
Different councils and different rescue organisations can have different rules about how long they can keep animals.
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.
Spiders use different types of silk for different purposes – and not all of them are as strong as steel.
Using a sing song voice helps babies tell the difference between words like 'mummy' or 'daddy'.
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.
Pets, like guinea pigs, lead very different lives to humans – and that's why they need very different eyes, too.
The earliest typewriters had the letter keys in alphabetical order. The trouble was that if you hit two keys quickly the levers would jam.
Tickling is an important sign that someone – or something – is touching you. An expert explains how it works.
It has been reported that at least one snail lived as many as 14 years in captivity. His name was George and he lived in Hawaii, in the United States.
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.
By studying old and dead stars, we can discover what will happen to our sun in the far, far future. And it won't end with a big explosion.
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.
The first thing to know is that Siri is not a "who" – Siri is a "what".
December is named for the Roman word for "tenth". So, why is it the twelfth month?
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.