By Carol Saab, 20 June 2013
Our eyes play a huge part in helping us explore the world around us, but occasionally they play tricks on us. In this optical illusion, we’re testing your perception of colour by making an after-image optical illusion. In other words, we’re tricking your eyes to see colours that aren’t really there. Check it out!
Categories:
By David Shaw, 18 June 2013
How did people multiply before calculators were invented? You could try doing it in your head, but you could also use a mechanical calculator, such as this set of Napier’s bones.
By Pat, 14 June 2013
Winter doesn’t just mean colder temperatures – there is also a rise in some diseases, including the number of cases of flu. The word flu is short for influenza, which is a fairly common disease. Symptoms include fever, cough, runny nose and muscle aches. Those affected can often be sick for a week or more. […]
By Pat, 7 June 2013
It’s hard not to be impressed by the power of the ocean. The thunderous crash of waves during a storm and more gentle movements of the tides have captured many people’s imaginations. But the power of the ocean is not just poetic – it could literally be used to provide electricity.
By Pat, 31 May 2013
Aboriginal and Torres Strait Islander people have a long history with their land. They are one of the oldest continuous cultures in the world.
By David Shaw, 21 May 2013
Here’s a fun puzzle! It’s a maze with no walls. So what’s keeping you on track? Well, this maze is made of arrows – it’s an arrow maze!
By Mike, 18 May 2013
Two centuries ago, nobody knew much about what made a single fertilised cell grow into a human. Or – for that matter – a dog, a sea urchin, a worm or a whale. The problem was nobody could imagine how a microscopic bag of chemicals could possibly split in half again and again, yet still […]
By Pat, 17 May 2013
Strike a match. It lights thanks to phosphorus. This element doesn’t just have fiery applications – it’s important for life itself.
By Jasmine Fellows, 11 May 2013
Looking for a mummy this Mother’s Day? Try this activity!
By Pat, 10 May 2013
Robots have been a popular part of science fiction for years. While robots that can think and feel like humans are still just a fantasy, robotic systems are already having an impact on our lives. CSIRO runs one of the largest robotics research centres in the world, the Autonomous Systems Laboratory. Instead of trying to […]
12 months, 8 issues
Print & digital subscriptions available.
Sign up to our Double Helix newsletter
Stay in touch with new updates by signing up to our free newsletter
Perfect for ages 8 – 14
Developed by experienced editors
Engaging and motivating
*84% of readers are more interested in science
Engaging students voice