To celebrate the centenary of the general theory of relativity we asked physicist David Tong to explain the theory and the equation that expresses it. Watch the video or read the article!

El Niño is a climate event without equal, causing droughts, floods, hurricanes and typhoons around the globe. How can we understand and predict it?

Read about the rocky road to one of Einstein's greatest achievements: the general theory of relativity, which celebrates its centenary this year.

General relativity, Einstein's rise to international stardom, and his legacy.

How longitude presented one of the greatest problems in history.

Why the North Star tells you your latitude.

What are global coordinates?

The mathematical problem with turbulence.

If you are a flower then April is allegedly the cruellest month, but if you are a student of any sort then I'm sure you would have picked June.

The division of plant cells is governed by their shape – just one example of how maths may reveal the fundamental laws underlying biology.