The telescope discovers the oldest solar system to date.

Two mathematicians' visit to the desert sheds new light on avalanches.

Observers are, of course, vital in physics: we test our theories by comparing them to our observations. But in cosmology, as Jim Hartle explains, we could be one of many possible observers in the Universe and knowing which one we are is vital in testing our theories.

Find out about the maths in doctor Who, and the film and gaming industry more generally.

Play with our applets to explore the conic sections and their different definitions.

To celebrate the release of more English translations of Einstein's papers, we revisit one of his previously unknown models of the Universe.

Where planets are born is not necessarily where they will stay…

Anything involving bunny rabbits has to be good.

A Klein bottle can't hold any liquid because it doesn't have an inside. How do you construct this strange thing and why would you want to?

Language analysis shows how the nation's tastes have changed.