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Growing dough brainteaser Brainteaser

by David, 6 October 2022 | 2 comments

Brain icon

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.

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Struck by lightning – a quick quiz Quiz

by David, 5 October 2022 | 1 comments

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?

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What caused this circle in the desert? News

by David, 29 September 2022 | 2 comments

Orange yellow and green image with an orange dot within a ring in the centre.

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?

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Let’s hear it for the girls! News

by Jasmine, 28 September 2022 | 0 comments

Two girls looking at a model DNA double helix

We’re looking forward to next year’s International Day of Women and Girls in Science. So, we want to hear from Double Helix readers who are girls.

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My favourite book brainteaser Brainteaser

by David, 23 September 2022 | 0 comments

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Difficulty: Fun On my bookshelf, my favourite book is the third from the left, and it’s the seventh from the right. How many books are there on that shelf?

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So many legs! – a quick quiz Quiz

by David, 8 September 2022 | 1 comments

We humans only have 2 legs, but a lot of creatures have many more. Do you have the legs to go the distance and get 5/5 on this quiz?

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Curved origami sculpture Activity

by David, 7 September 2022 | 0 comments

A curvy, ridged shape a bit like a potato chip

Folding origami cranes and paper aeroplanes is fun, but they tend to be made of straight lines. So what happens when you fold in curves?

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Picture This News

by Fiona, 1 September 2022 | 0 comments

Person in labcoat, mask and gloves looking at a screen and pressed plant specimens

Open the large sliding cabinets to shelves, stacks and pigeonholes. In front of you is a plant collection with nearly a million different specimens. But what’s with the conveyor belt?

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Straight curves Activity

by David, 31 August 2022 | 0 comments

Skewers are straight and pretty tough. But put just the right twist on them, and you can make something surprisingly curvy!

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Hooray for biodiversity – a quick quiz Quiz

by David, 25 August 2022 | 1 comments

September is Biodiversity Month. Celebrate by taking this quiz about the variety of life you’ll find here on Earth. How biodiverse is your knowledge?

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