Forget about the threat that mankind poses to the Earth: our activities may be shortening the life of the universe too. The startling claim is made by a pair of American cosmologists investigating the consequences for the cosmos of quantum theory, the most successful theory we have. Over the past few years, cosmologists have taken this powerful theory of what happens at the level of subatomic particles and tried to extend it to understand the universe, since it began in the subatomic realm during the Big Bang. The Boomerang Nebula, mankind ‘shortening the universe’s life’ Cosmologists claim by observing dark...