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Sometime around now, the 8 billionth living person will be born. It might already have happened – the United Nations estimates it will happen on 15 November. Other experts think it might happen later. We’ll never know for sure when or where the 8 billionth person was born, but one thing is certain, Earth’s population…

Difficulty: Tricky A new class of aliens is due to start at Alien Academy. The teachers need to know the age of each alien, but can’t contact them. Luckily, they have a few clues to help them. There are five aliens (Filp, Agg, Nim, Phod, and Mex) and each alien is a different age (7,…

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.

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

Difficulty: Tricky There are 4 houses that stand in a row. One family lives in each house. The O’Connells live next door to the Taos, but they don’t live next door to the Sosas. The Prasads don’t live next door to the Sosas. Who lives next door to the Prasads?

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?

Difficulty: Extreme! Nguyệt keeps a bread dough in her fridge. She tends to it so that every day it doubles in size, and then every morning, she cuts off enough dough to make one loaf of bread for her breakfast.

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?