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In the southern parts of the world, spring has sprung, and there’s a lot more sunshine about. See how you go with this solar themed quiz!

By Bill Flynn Whether you are at school, at home or self-isolating you can be a part of the United Nations International Day of Clean Air for Blue Skies on Monday 7 September. How? By contributing to NASA’s citizen science global database! Download the GLOBE Observer app and photograph the cloud cover from your window, […]

Kia ora! Here’s a quiz for our friends across the ditch. Have you got the knowledge to get 5/5?

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.

Difficulty: Taxing Here’s a beautiful artwork from 1895, titled Mental calculation. In public school of S. A. Rachinsky, painted by Nikolay Bogdanov-Belsky. Can you solve the puzzle the kids are pondering? If you can’t quite see the equation, here it is:

By Natalie Kikken Did you know that nails grow on a turtle’s flippers? At Ningaloo Reef, Western Australia, turtle nail clippings are providing new and exciting insights. CSIRO scientists can work out what turtles eat by analysing the chemicals in these nail samples.

Craft yourself a mathematical ring to learn about straight lines on donuts. Don’t laugh, they do exist!

Difficulty: Tricky Gertrude has a collection of shapes that she likes to arrange in patterns. She starts with a regular hexagon with 10 cm sides, and three regular triangles that also have 10 cm sides. She arranges the triangles around the hexagon, and then lines them up. In the end, one side of each triangle […]

Paleontologists learn a lot from looking at bones. Assembling a skeleton can show how a creature moved, where they lived, and even how fast they were.

Death is a fascinating and important topic for many scientists. It can also reveal much about life. If you get 5/5 this week, maybe you should consider a career in thanatology!