Here’s a great trick of the light that looks like magic. Put a picture into water, and the colour disappears! And the best thing is, the colour comes back when you take the picture out again.
NASA’s Ingenuity helicopter has made history by flying on Mars. To celebrate the first flight of a copter on another planet, here’s a simple unpowered helicopter you can build at home!
Imagine you’re a tangle-web spider, and you’ve just snared a nice big critter for dinner. Sounds great, huh? Except there’s a problem. Dinner is 50 times heavier than you, and it’s trying to escape. What’s a spider to do?
