orientability

Mathematicians solve the famous loop's mystery

In the first of a new series 'Imaging Maths', Plus takes an illustrated tour of an extraordinary geometric construction: the Klein bottle.

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.

The maths of COVID-19

All our COVID-19 related coverage at a glance.
Why the generation time of COVID-19 is important

To work out the famous R number you need to know the time between infections.
Solving crimes with maths: Bloodstain pattern analysis

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

Can you capture people's behaviour in epidemiological models?
What are probability distributions?

Here's an introduction and some examples.