## Maths in a minute

Want facts and want them fast? Our *Maths in a minute* series explores key mathematical concepts in just a few words. From symmetry to Euclid's axioms, and from binary numbers to the prosecutor's fallacy, learn some maths without too much effort.

We look at a crafty mathematical device which, among other things, has helped people understand what causes cholera.

How should people arrange themselves for maximal socialising at a safe distance?

Explore a mystery that intrigued Stephen Hawking until the end of his life.

Nothing, not even light, can escape from a black hole. Or can it? Find out about one of Stephen Hawking's most radical results.

Would you like to get away from Earth? Here's how fast you would need to go.

How does the voting system for the European Parliament elections work?