## 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.

Change is the only constant in our lives — which is why differential equations are so useful.

The origin story of this famous sequences stars some cute, fluffy bunnies.

What is herd immunity and what does it have to do with a number called

*R*_{0}?How should people arrange themselves for maximal socialising at a safe distance?