When a sound is made, it spreads. And when it hits a hard surface that is far away, it bounces back and comes back to where the sound was made. That's what we call an echo.
When my kidneys stopped working properly, my dad gave me one of his kidneys. Thanks, Dad.
Sometimes, two different animals will evolve to have a similar adaptation, even when they are not closely related. Flight is an excellent example.
It's good to know how currents are formed in the ocean, as they can be quite dangerous!
The brain itself can’t actually feel pain. It can't sense damage to itself the way your finger can. We know this because people can have brain surgery while they are totally awake.
Fruit ripening is all about plants getting animals to eat the seeds that are inside their fruits. This helps the plants get their seeds to somewhere new where they can grow into a new plant.
An adult brain weighs about 1.5kg. It's mostly water with some fat, protein, sugar and a dash of salt. Sounds like pancakes, I know, but I once tried chicken brains and, well, pancakes are tastier.
Molluscs that have shells - like pipis, clams and oysters - have to build their own shell from scratch. And they keep building it their whole life, using chemicals from the sea and their own bodies.
The pressure in the deepest part of the ocean can be 1,000 times greater than the pressure we experience at sea level – but creatures that live and visit there have some very special features.
The first mummy was wrapped up about 7,000 years ago, and it was from South America.
Your stomach works very hard with some other body parts to break down food into small pieces. Your body takes in what it needs and the rest is turned into poo.
Robots are not yet as good as humans at working with other humans or even working with other robots.
There are three ways heat can be shared: conduction, convection and radiation. Find out which one lets heat travel through space.
Shooting stars are not stars at all. They are tiny space adventurers who accidentally wander into our sky and get sucked toward us by Earth's gravity. Here's the story of a shooting star's journey.
We can't make it rain. But you are already helping if you don't use more water than you need. And you can talk to your parents about the planet getting warmer, because the heat makes drought worse.
The northern lights might look like magic, but they can actually be explained by science – here's how.
Why is thunder so loud? It's because the amount of electrical energy that flows from the cloud to the ground is so enormous.
As a police officer, I was involved in many pursuits, investigated serious accidents and later became a researcher. Here's what I've learned about how police make decisions in a pursuit.
As gas from your stomach comes up your food pipe, it makes the surface of the upper part of your oesophagus rattle and vibrate. It is a bit like windows that rattle during a windy storm.
While we move soap around, it lifts up invisible oil that holds germs onto your hand.