Francis Crick and James Watson made the greatest biological discovery of the 20th century when they solved the structure of DNA.  Photograph: Cold Spring Harbor Laboratory Archives/The New York Times

Everyone has heard of the seven wonders of the ancient world. Today I present my verdict on seven wonder discoveries in biological research, listed in(...)

Charles Darwin discovered natural selection.

There are good scientific reasons to think that life exists elsewhere in the universe beyond earth, but how would we recognise alien life if we saw it(...)

David Attenborough has seen far more than perhaps anyone else alive, and is still eager to see more. Therein lies his genius. Photograph: Sarah Dunn/ BBC

David Attenborough turns 90 tomorrow, fittingly perhaps on the anniversary of Victory in Europe Day. He no doubt will smile with characteristic bemuse(...)