The Birth and Death of the Universe May Hinge on Black Holes

The universe is expanding. No one with any expertise in astronomy or physics disagrees with that fact.

Likewise, nobody really disagrees that, at some point many billions of years in the future, 

the universe is going to expand too far—and run out of energy for further expansion. 

At that point, something has to change. That’s where the disagreement begins.

There’s a new wrinkle in that cosmological argument, and it’s a doozy. According to a new study from cosmologists 

Daniela Pérez and Gustavo Romero, both from the Instituto Argentino de Radioastronomía, 

the universe has been repeatedly expanding and contracting, and big black holes are some of the only things

 These cycles are part of what cosmologists call a possible “cosmological bounce.”

A mathematical model of a theoretical black hole is the centerpiece of Péerez and Romero’s

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