Fifty years ago, on April 25, 1974, a Eurovision song played over the radio in Lisbon gave the signal for the beginning of a military coup in Portugal. Alex Fernandes, author of the book The ...

A look back at some of the singer's hits after the star dies at the age of 83. David Attenborough on the discovery of the dumbfounding platypus. In 1995, the Hubble Space Telescope sent back ...