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

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?

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.

Open the large sliding cabinets to shelves, stacks and pigeonholes. In front of you is a plant collection with nearly a million different specimens. But what’s with the conveyor belt?

Physics can be mouth-watering. Think of the sizzle as chips deep-fry. Turns out there are 3 kinds of sizzle sounds! Can you read this without getting hungry?

If you get bored eating the same thing over and over, spare a thought for dogs. Many pet dogs eat the same thing every day, week after week. And a change in food can be abrupt – empty the old bag of dog food, and start with something brand new. But how long does it take a dog to adjust to a new diet?

Have you ever struggled to pack balls back into your toy box? The Fields Medal, one of the most famous prizes in mathematics, was recently announced. One of this year’s winners, Ukrainian mathematician Maryna Viazovska, is an expert in packing balls in boxes. But there’s a catch! Her findings work in 8 dimensions (D) and beyond.

Australia has many amazing land snails. There are currently about 1,500 described species and another 1,000 waiting to be named.

It sounds like a perfect way to make money – scientists from The Australian National University (ANU) are now selling random numbers over the internet! But before you start your own business writing whatever number pops into your head, there’s something special about these numbers.