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By Krishitha Gopalakrishnan Have you noticed how you always seem to remember where you hid that chocolate bar but that apple you thought you’d packed for school suddenly seems to have disappeared? Don’t worry, it’s in our genes! It turns out that humans are better at recalling where junk food is.

Although this theme is a bit funny, the questions are no joke. Can you get serious and ace this quiz?

By Natalie Kikken Did you know that nails grow on a turtle’s flippers? At Ningaloo Reef, Western Australia, turtle nail clippings are providing new and exciting insights. CSIRO scientists can work out what turtles eat by analysing the chemicals in these nail samples.

Paleontologists learn a lot from looking at bones. Assembling a skeleton can show how a creature moved, where they lived, and even how fast they were.

When you think about a beehive, you might imagine it containing flat combs made of perfect hexagons. Except, that’s not the whole story. There are many different species of bees, and there are lots of ways that bees build their combs.

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!

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.

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

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?