Dangerous Knowledge

A BBC documentary about the lives and work of Georg Cantor, Ludwig Boltzmann, Kurt Godel and Alan Turing.One went insane, another starved himself to death and two committed suicide. Find out why.

From top left: Cantor, Boltzmann, Turing and Godel

Marcus du Sautoy on Symmetry

In this entertaining lecture Marcus du Sautoy talks about his quest to discover symmetry in mathematics and in life.