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These bath bombs are crafted mini models of your favourite planets! We promise they’ll smell better than Uranus.

Stars, telescopes, action! Can you catch the shooting star and get a 5/5 on this space quiz?

Two tubes, both the same weight and the same size, and yet slightly different. Can you guess which one will win the rolling race? Safety: This activity uses a sharp scalpel or scissors to cut a cardboard tube. Ask an adult to help.

When we look at a very bright object and then look away from it, why do we still see the object’s outline?

We’re celebrating recycling in this quiz! Can you salvage a passing score, or will you end up in the garbage?

Back in the time of the dinosaurs, Australia was just one small part of a much bigger continent. Can you piece together the ancient supercontinent, Gondwana?

Have you heard of continental drift? The ground under your very feet is moving! Here in Australia, we’re moving about 7 centimetres north every year. In a few million years, we could run into Southeast Asia. But what about the far future, 300 million years away?

A flash and a bang! This quiz is all about electrical storms. Can you catch lightning in a bottle and get 5/5 this quiz?

In between Adelaide and Perth lies the Nullarbor, a vast, dry plain. It’s famously flat; the railway line goes dead straight for almost 500 kilometres before it needs to turn. But hidden in the saltbush, scientists saw a strangely circular hill. So where did this circle come from?

We’re looking forward to next year’s International Day of Women and Girls in Science. So, we want to hear from Double Helix readers who are girls.