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Our Microscope column answers the most intriguing science, tech, engineering and maths queries you can throw at us. So, why do voices sound so different on voice recordings?

When astronomers first looked at the Moon through telescopes, they thought they were seeing great oceans. They gave the Moon’s big, dark patches names such as Oceanus Procellarum, and the Sea of Tranquillity. Now we know that these ‘seas’ are ancient lava flows, and that the Moon’s surface is very dry. It’s also airless.

A famous person built a square house so that the windows on all four sides look south. Where is this house? (And can you name the famous person?)

How do insects choose their favourite weed? Scientists hoping to control weeds want to know if these insects will eat other plants or only their absolute favourite weed.

Have you ever wondered how water striders can walk on water? Wonder no longer!

Twinkle, twinkle, giant stars! Pairs of so-called ‘heartbeat’ stars change their brightness like the rhythm of a beating heart. For the first time, new models show that they also create gigantic waves.

From unstoppable scientists to terrifying natural phenomena, we’re taking on forces of nature. Naturally we hope you get a 5/5, but don’t force it!

Journalism is not just for adults. We know young writers and readers want science news that’s fascinating and fun. So, CSIRO Double Helix magazine and Letterly are hosting a “Young STEM Journalism Bootcamp” this school holidays.

The warm weather is perfect for a cool meal! Ceviche (suh-VEE-chay) is a popular dish from Central and South America that relies on lime juice to “cook” seafood without any heat.

Take a look around the zoo and you might spot animals using tools to make their lives easier. Otters use stones to crack into shells, and chimpanzees use sticks to fish up termites. But it’s not just about food. Last week, scientists wrote about a whole new example of tool-use in elephants … and one elephant may be capable of pulling a tool-based prank.