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A battery’s power comes from a chemical reaction that happens inside the cell.
Pardon me!
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Oh! Excuse me! Please pardon my sphincter, esophagus and throat.
Galileo thought Saturn looked a bit like the head of a teddy bear with two big ears. He thought it may be made of three planets.
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Most people think that many millions of years ago, Saturn didn’t have rings at all. Instead, it had a big moon moving around it. Eventually, the moon burst and broke into pieces.
Sleep paralysis is when you wake up but feel like you can’t move.
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Sleep paralysis – when you wake up but feel like you can’t move – seems to be more common if you sleep on your back. But we don’t know why.
I’m parched as.
Nick Harris/Flickr.
Fish that live in the sea have found amazing ways to control the amount of water and salt in their bodies, and stay hydrated.
When you have a wound, your body gets to work straight away to clean it out, kill germs and repair the skin.
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The body tries to plug a wound quickly to stop germs getting in through broken skin and making you sick. But behind the scenes, your blood is working hard to repair a wound.
Have you ever wondered why U.S. money is green?
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The color of American money goes back to the British colonies.
Like magic.
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Mobile phones and tablets are basically mini computers – and to a computer, everything is a number.
The world’s smallest frog can fit on a dime.
E.N. Rittmeyer et al. (2012)
Scientists have identified the world’s smallest animal – for now. It could be possible smaller creatures exist that have not yet been discovered.
Scientists don’t know for sure why this happens - but we have some theories.
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The truth is scientists aren’t exactly sure why our fingers and toes get wrinkly in the bath. But here’s what we know, and what we suspect.
Hummingbirds flap their wings 800 times per minute.
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How do hummingbirds drink sugary nectar and not get sick? Don’t they need a balanced diet to stay healthy? Do they eat anything else?
There are so many number systems! The ones you know now were developed over centuries but we are still making up more now.
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The Romans were great engineers but they had a terrible number system. It didn’t even have zero.
Most people cry when they’re feeling sad, or when they are having big feelings.
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Crying is something everyone does sometimes – an expert in the history of emotions explains why people cry to express their feelings.
When you’re feeling sick, your immune system is fighting to get you well again.
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The white blood cells act as an army of fighting cells, protecting your body from bad cells known as germs. White blood cells can capture germs and even swallow them.
Rats will eat anything and they have a LOT of babies. That’s why there’s so many of them.
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Black rats are originally from India and brown rats are originally from China.
Even when we are asleep, we can still feel if we are comfortable and our ‘sixth sense’ is working to let us know where we are in our beds.
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Our body knows how it is moving and where it is because of a sense called proprioception, a ‘sixth sense’ that helps your body know where it is in the world. And it works even while you’re asleep.
Those worksheets might not do much for a child’s grades.
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How much homework kids should do is a subject of great debate.
Everyone forgets things sometimes.
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Have you ever walked into a room and realised you can’t remember what you were looking for? We tend to do this more when we are thinking of a few things at once or doing two things at the same time.
Blowing bubbles is fun and also involves a lot of science.
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Bubbles in fizzy drinks are full of science you probably didn’t know about - and which can even be found in volcanoes!
If you have been drinking more water than your body needs, the body tells the kidney filters to get rid of the spare water. That’s when your urine will look paler.
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One of the waste products that your kidneys put into your urine is a chemical called urobilin, and it is yellow.