How long does it take for one person to infect another?

A beautiful argument to show that all parabolae are similar.

The doubling time for the Omicron variant seems to be scarily fast. But how do you calculate it?

Can you capture people's behaviour in epidemiological models?

What's a quality adjusted life year, or QALY?

How does a smooth flow suddenly become turbulent? The Reynolds number helps understand the transition.

Markov chains are exceptionally useful tools for calculating probabilities, and they might increase your chance of getting to the beach!

Some basic trigonometry can deliver vital evidence from the scene of a crime.