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Make a reed switch Activity

by Mike, 10 June 2021 | 0 comments

By Mike McRae and David Shaw Attracted to doing some hands-on science? Why not use a magnet to create a ‘reed switch’?

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How do ‘I am not a robot’ quizzes work? News

by David, 9 June 2021 | 2 comments

A computer screen saying 'I'm not a robot'

By Mike McRae Double Helix magazine is looking for your questions! Our Microscope column answers the most intriguing science, tech, engineering and maths queries you can throw at us. Comment down below with your question, or email us at Helix.Editor@csiro.au. The best questions will be published in our magazine! Here’s a sample question to get…

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Video views brainteaser Brainteaser

by David, 3 June 2021 | 0 comments

Brain icon

Difficulty: Tricky Gordon is trying to make it big with his Minecraft-themed parody song channel. He spends a lot of time working on each video, and he wants as many views as possible. Gordon’s noticed some patterns with his view numbers:

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Ooh! Shiny – a quick quiz Quiz

by David, 2 June 2021 | 0 comments

Black lightning bolt in purple circle

This quiz is all about shiny things. Will there be a glimmer in your eye as you get 5/5?

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How fast did T. rex walk? News

by David, 27 May 2021 | 0 comments

Skeleton of T-rex

Are you faster than a Tyrannosaurus rex? Scientists are still arguing about how fast a T. rex could run, if it could run at all. But most animals walk more than they run. So how fast is a tyrannosaur’s walking speed?

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Swap the blocks Activity

by David, 26 May 2021 | 1 comments

Six squares drawn in a grid, two end squares are coloured, one red, one blue. There are tiles on five of the six squares.

Here’s a puzzle that’s easy to set up, but surprisingly tricky to solve. See if you can swap two counters just by sliding them!

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Idir’s tiles brainteaser Brainteaser

by David, 20 May 2021 | 1 comments

Brain icon

Difficulty: Tricky Idir was in the bathroom when he noticed that the tiles weren’t all the same shape! Instead, there were two different shapes of tiles.

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Rivers – a quick quiz Quiz

by David, 19 May 2021 | 3 comments

Black lightning bolt in purple circle

This quiz is all about rivers. Let your knowledge flow and see how many questions you can get right!

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Magic colouring Activity

by David, 13 May 2021 | 1 comments

Drawing of a butterfly half emerged in water, the top half is coloured.

Here’s a great trick of the light that looks like magic. Put a picture into water, and the colour disappears! And the best thing is, the colour comes back when you take the picture out again.

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Storms clean the air News

by David, 12 May 2021 | 0 comments

Storm clouds rolling over the ocean.

After a rainstorm, doesn’t the world seem so clean? You might think of storms washing the earth – but they’re cleaning the air too!

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