What's new

Your eyes can see colour and brightness, but there’s one more thing they can detect. With the right technique, many people can tell if light is polarised – no glasses needed!

Difficulty: Tricky Ari was 10 on her last birthday, and will be 12 on her next birthday. How can this be true? Lachlan was 8 on his last birthday, and will be 12 on his next birthday. How can this be true?

Right now, there are about 7.8 billion people on Earth, and that number keeps on growing. But could this growth be coming to an end? Experts have made a new prediction that Earth’s population will not reach 10 billion people. And the reasons why are surprisingly positive.

The best way to do maths is to have fun! Here’s a selection of our favourite games and puzzles.

Get in fast to do this quiz! For better or worse, we’re looking at some things that are almost gone.

By Beth Askham and David Shaw Did you know that electricity and magnetism are closely related phenomena? In this activity, you’ll create a magnetic field using electricity and find that this can cause chaos for a compass!

Difficulty: Taxing Terri’s destructive testing lab is very popular. The most important piece of equipment is an electric-powered ram that smashes into samples to see how tough they are. It’s powered by capacitors, and by changing the number of capacitors that are plugged in, Terri can control how powerful the ram is.

Penguins come in many shapes and sizes, from little penguins all the way up to kings and emperors. But millions of years ago, penguins were even bigger, and studying these gigantic birds can teach us a lot about evolution.

Scientists aim for accuracy, but it’s not always possible to be exactly right. This quiz is all about getting close, and not always close enough! So how close to full marks can you get?

Did you know you can control the speed of a splash? Time to make some speedy waves, before using a neat trick to slow them down.