James Lovelock discusses his controversial theory that proposes Earth be seen as a single living organism and the consequences that this could have for its future. Show more

Sir Tim Hunt talks about his discovery of the mechanism of cell division and reveals his own opinions on the thought processes, logical and emotional, that led to it. Show more

Professor Dame Jocelyn Bell Burnell describes how she discovered pulsars, the by-products of supernova explosions which make all life possible. Show more