You could jump much higher on the moon than you can on Earth – but you'd be in no danger of shooting off into space.
Researchers pour a barrel of hagfish into a holding tank aboard a research vessel about 20 miles off the coast of Portsmouth, New Hampshire.
AP/Steven Senne
Yes, the Sun absolutely spins. In fact, everything in the universe spins. Some things spin faster than the Sun, some are slower and some things spin 'backwards'.
Big worries can feel scary and confusing. Sometimes a little worry can feel like a big one too.
barskefranck/pixabay
Birds spend a lot of time and energy singing, but they don't do it the same way in every season of the year. And some can't sing at all. What's the purpose of birdsong?
People do live outside Earth – on the International Space Station! But humans have had to find a way to make the conditions there more like what we’re used to at home.
Flickr/NASA's Marshall Space Flight Center
Emperor penguins have a few hidden tricks to stay warm, like blood vessels in the nose arranged so they can regain most of the heat that would be lost by breathing.
Without rules, you would have a LOT of decisions to make every day.
Flickr/Niklas Hellerstedt
Think of it like a ladder. You might not be at the top right now, but each new thing you learn takes you a step closer and means that your parents can relax the rules a little.
Jumping spiders, like this one, usually have eight eyes: two very large front eyes to get a clear, colour image and judge distance, and extra side eyes to detect when something is moving.
Flickr/Thomas Shahan
It's true that here on Earth, if you want to burn something you need oxygen. But the Sun is different. It is not burning with the same kind of flame you would have on Earth if you burned a candle.
Being double jointed doesn't mean you have an extra joint – an expert in biomechanics explains what makes some people doubly bendy.
Writing wasn’t just invented once by a single person. Many different ancient societies invented writing at different times and places.
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Writing has only been a part of the human story for the last 5,000 years. In comparison, humans began to communicate using speech some 50,000 years ago.
The short answer is that leeches need blood to grow and reproduce. But it's in their interests to do it carefully, without causing too much pain, and in spots that are hard to find.
Around 66 million years ago, a huge rock from outer space (called an asteroid) smashed into the Earth.
Michael J/flickr
Dinosaurs ruled the Earth for about 180 million years. But around 66 million years ago, a huge rock from outer space (called an asteroid) smashed into the Earth. Then things got worse for dinosaurs.