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Here are five space science questions to challenge you. Is your mind a great expanse, or are you a bit spaced out?

Here’s a great excuse for a trip up a mountain! Grab some bottles and learn why it’s hard to breathe at the top of tall mountains.

Difficulty: Tricky Abelina and Ben bought a bag of jelly beans, and decided to split it. When they shared the jelly beans out, they split evenly and there wasn’t any remainder.

For almost two years, NASA’s OSIRIS-REx spacecraft has been orbiting an asteroid named 101955 Bennu. It’s done tons of science, scanning the rock from many angles. Right now, OSIRIS-REx is preparing to head back to Earth. But before leaving Bennu, the spacecraft reached out and touched the asteroid.

By Krishitha Gopalakrishnan Everything is related to science. Take your food for example. Carrots, burgers, ice-cream…you name it! Let’s see how well you know your food with a few questions!

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.

By Rok Willesee Difficulty: Tricky A scientist was looking back at notes they made about their experiments. Unfortunately, in one experiment the scales didn’t work. Can you help them work out what the weight should be in the final experiment?

Here’s a quick sliding puzzle to get your brain pumping. See if you can separate the light and dark counters in as few moves as possible!

There’s something afoot in this quiz! Can you get 5/5 and become a leg-end?

This month, CSIRO released its latest collection of favourite hands-on activities for kids. The Double Helix editorial team explains the thinking, splashes, scares and surprises they encountered while testing their new book: More Hands-On Science.