## 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.

At any point in time there are two points on the Earth's equator with the same temperature.

Take a quick trip to the foundations of probability theory.