# 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.

Why a positive test result doesn't necessarily mean you have the disease.

Here's the ancient proof that there are infinitely many prime numbers.

What would happen if the Sun suddenly exploded? Einstein wondered the same thing, and completely changed our understanding of the Universe.

We all instinctively recognise symmetry when we see it, but describing it in words is harder than you might think.

Our messy desk is proof of the second law of thermodynamics...

Claude Shannon's ingenious insight linking physical circuits with Boolean algebra paved the way for modern computing.

Opinion polls, election forecasts, testing new medical drugs — none of these would be possible without the central limit theorem.