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How the big bang chilled out

点击量:   时间:2017-09-12 06:01:12

YOU would think that right after the big bang, the universe would have been pretty hot. In fact it looks like things were a lot cooler than you might imagine. Cosmologists believe that the universe went through a rapid period of expansion known as inflation. But, says Pedro Ferreira at the University of Oxford, they usually ignore the effects of temperature on inflation – and that’s a big mistake. “At the violent temperatures we assume are around at the time, everything would be moving rapidly,” he says. “Space-time itself would be bubbling and boiling.” Ferreira and João Magueijo,