Faster than the speed of light

20 amazing answers t o curious

Isn’t it amazing that astronomy – humanity’s oldest science – continues to generate such a delightful amount of new knowledge? Seeing as we’ve been studying the motion of the stars for a good long whi

Our eyes paint such vivid portraits of the world around us that it’s easy to forget how much of our surroundings go unseen. Wi-Fi signals pinging this way and that, subatomic particles and radiation z

Of the hundreds of thousands of asteroids in our solar system, it is all too feasible that one could strike Earth. If scientists discover this is likely to happen, what are our options for defending ourselves – and who will make the key decisions? Tomas Weber reports

‘The universe is a pretty big place. If it’s just us, it seems like an awful waste of space,’ wrote the American astronomer and author Carl Sagan in his book, Contact. Ever since humans first huddled

A crack-of-dawn start is one way to avoid the crowds. But there’s another option that doesn’t need an alarm clock.