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Does Dark Matter Come From Black Holes Formed Before the Big Bang?

"The Big Bang may not have been the beginning of the universe," writes LiveScience, citing "a theory of cosmology that suggests the universe can 'bounce' between phases of contraction and expansion." The recent study suggests that dark matter could be composed of black holes formed before the Big ...

"The recent study suggests that dark matter could be composed of black holes formed before the Big Bang, during a transition from the universe's last contraction to the current expansion phase... In the new study, researchers explored a scenario where dark matter consists of primordial black holes formed from density fluctuations that occurred during the universe's last contraction phase, not long before the period of expansion that we observe now. "Small primordial black holes can be produced during the very early stages of the universe, and if they are not too small, their decay due to Hawking radiation [a hypothetical phenomenon of black holes emitting particles due to quantum effects] will not be efficient enough to get rid of them, so they would still be around now," Patrick Peter, director of research at the French National Centre for Scientific Research (CNRS), who was not involved in the study, told Live Science in an email.

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