# Maths in a minute

Take a quick trip to the foundations of probability theory.

Double counting proves a neat result in graph theory.

Physicists believe that around 82% of all the matter in the Universe is invisible

*dark matter*. But if it's invisible how do they know it's there?Compound interest is the curse of debt and the blessing of saving. Find out how it works and what it has to do with one of the most important numbers in mathematics.

Here's a quick introduction to the beauty queen amongst mathematical formulas.

How does LIGO detect gravitational waves? Here is a quick introduction.

A quick introduction to one of the greatest discoveries of the century.

A quick introduction to the monsters that lurk at the centre of each galaxy.