What’s the coldest thing in the universe? You may have heard of absolute zero, the coldest temperature possible. But a clever bit of mathematics has shown it might not be possible after all!
By Mike McRae This activity uses water and food colouring to explore fluid systems. It’s a good idea to do this activity in a safe place outside, and to wear old clothes while you do it!
Written by Matthew Dunn Illustrated by Alex Hallatt From absolute zero to the surface of the Sun, there’s a whole range of temperatures in our Universe. Let’s learn more!
Welcome to Double Helix magazine’s Q&A section – Microscope. We take a close look at small questions full of big ideas. Q: I want to know which is hotter, fire or lava? Or are they both the same?
