10 mysteries of the universe: What came before the big bang?
19 September 2018
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
19 September 2018
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
19 September 2018
A faint afterglow in the sky tells of a universe that exploded into being 13.8 billion years ago. But we haven't got the full story of the big bang nailed yet