Space
10 mysteries of the universe: What came before the big bang?
Searing bursts of radio waves first spotted a decade ago could come from bouncing black holes – and that suggests a universe might have existed before ours
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Searing bursts of radio waves first spotted a decade ago could come from bouncing black holes – and that suggests a universe might have existed before ours
Physicists from Einstein to Hawking tried and failed to unite gravity and quantum theory. Now we have hints of a better – but not so beautiful – answer Â