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Browning apple experiment
Why do apple slices go brown? In this experiment, test out the anti-browning abilities of common liquids. And discover the surprising biology of browning! You will need 2 apples (make sure they’re the...
View ArticleMagnets – A quick quiz
This week, magnets really attracted our attention. We’re conducting a straw poll: can you pull in a 5/5? QUIZ START The post Magnets – A quick quiz appeared first on Double Helix.
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Say cheese! Playful dolphins smile too
A dolphin’s open mouth smile. Credit: ZooMarine, Italy CC BY-SA Do you laugh or smile when playing around with your friends? It turns out bottlenose dolphins do too! Scientists have found that...
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Make a pom pom cannon
All it takes is a little elastic to send a pom pom flying! Can you improve your aim with a bit of practice? You will need Small pom poms (or cotton balls or crumpled up paper) Toilet paper roll...
View ArticleBrainteaser: Beat the bell
Difficulty: Tricky Right before the bell rings, Jeri’s teacher throws up a problem on the board: “I’m thinking of a number. When I add its digits together and multiply by seven, I get the number I...
View ArticleStar struck – A quick quiz
With this quiz, everything is looking up! Can you dazzle us with a stellar 5/5? QUIZ START The post Star struck – A quick quiz appeared first on Double Helix.
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Thwip! A real-life Spider-Man web-shooter
The web mixture forming a string and lifting a bolt. Credit: Marco Lo Presti, Tufts University Friendly neighbourhood scientists have created their own version of Spider-Man’s webs. Their silk mixture...
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Make a solar system to scale
Space is huge. But exactly how huge are the spaces between the Sun, Moon and planets? Find out by making a scale model of the inner solar system at your nearby park! Credit: NASA You will need Ruler...
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Brainteaser: Fairy bread
Difficulty: Fun Rosario has a pink square of origami paper. She then folds one corner all the way to the square’s centre to make a new 5-sided shape. She discovers that the missing corner is exactly...
View ArticleTrust your gut – A quick quiz
We have a gut feeling that you’ll like this highly digestible quiz. Are you hungry for a 5/5? QUIZ START The post Trust your gut – A quick quiz appeared first on Double Helix.
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Biggest prime number found!
Credit: iStock.com/Igor Kutyaev The biggest ever prime number has just been found and it’s absolutely massive. It’s a number with more than 41 million digits. That means, if you were to type it out in...
View ArticleBrainteaser: Break the prime code
Difficulty: Fun Online security codes are often based on two very large prime numbers multiplied together, which is one reason why finding huge primes is a big deal! We’ve written a code using two...
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Train your very own AI
Training artificial intelligence (AI) can be as easy as 1, 2, 3! Teach an AI program or “model” to pull off a very simple card trick… and learn from its mistakes. Credit: GettyImages/Sunny You will...
View ArticleThanks, science! – A quick quiz
As the year starts to wrap up, people around the world are listing things they’re grateful for. We think science should top those lists! Can you top our quiz? QUIZ START The post Thanks, science! – A...
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Do elephants use tools for mischief?
Mary using the lasso-like grip to shower her back. Credit: Urban et al./Current Biology Take a look around the zoo and you might spot animals using tools to make their lives easier. Otters use stones...
View ArticleBrainteaser: Farm round-up
Difficulty: Tricky Farmer Doolittle has a farm with just cows and chickens. The farmer counts up all the animals and discovers that there are 43 heads and 120 legs on the farm (not counting the...
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Cook without heat – make ceviche
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. You will need 150...
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Become a science journalist this school holidays
Credit: fotostorm / Getty Images 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...
View ArticleForces of nature – A quick quiz
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! QUIZ START The post Forces of nature – A quick quiz...
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Heartbeat stars make waves
Artist’s depiction of the gravity of an orbiting companion star raising a wave that crashes and breaks on the surface of the star MACHO 80.7443.1718. Credit: Melissa Weiss/Center for Astrophysics |...
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