The original version of this story appeared in Quanta Magazine. In 1950 the Italian physicist Enrico Fermi was discussing the possibility of intelligent alien life with his colleagues. If alien ...

WASHINGTON, Oct 16 (Reuters) - When British naturalist Charles Darwin sketched out his theory of evolution in the 1859 book "On the Origin of Species" - proposing that biological species change over ...

Time has an arrow: It only ever seems to move in one direction. The future is always unknown to us, while the past forever remains locked and inaccessible. And yet, the vast majority of the laws of ...