Most precise experiment to date confirms one of Einstein's predictions

Controlled chaos produces realistic behaviour in robotic cockroach

E8 symmetry discovered in lab for the first time

Keeping up with temperature

Experiment discovers evidence for dark matter

We're all on a journey into the future, but can we travel into the past? Find out with Kip Thorne

We have all become more aware of the dangers of influenza this year, but why is it so dangerous? Julia Gog explains that the unusual structure of the influenza genome can lead to dangerous evolutionary jumps, and how mathematics is helping to understand how the virus replicates.

Making sure that vaccination works

Guidance for the classroom activity

An activity for the classroom

The obvious answer is 24 hours, but, as Nicholas Mee discovers, that would be far too simple. In fact, the length of a day varies throughout the year. If you plot the position of the Sun in the sky at the same time every day, you get a strange figure of eight which has provided one artist with a source for inspiration.