Extinction is a part of nature. Of the five billion species that have existed on Earth, 99.9 per cent have vanished. The Late Devonian extinction, nearly four hundred million years ago, annihilated ...

James D. Watson, whose co-discovery of the twisted-ladder structure of DNA in 1953 helped light the long fuse on a revolution in medicine, crimefighting, genealogy and ethics, has died. He was 97. The ...

Add Yahoo as a preferred source to see more of our stories on Google. Presumed portrait of Leonardo da Vinci (1452-1519), by an Unknown Artist. The painting hangs in the Uffizi Gallery in Florence, ...