Hy.princeton. Biographical Sketch Prof.
Paul J. Steinhardt Department of Physics Paul J. Before the Big Bang. "Cyclic-universe models were popular in the 1920s and '30s," Steinhardt says.
"But they were based on the idea of a Big Bang followed by a Big Crunch followed by another Big Bang. " In these models, the same matter is endlessly recycled, so the entropy of the universe—its tendency toward disorder over time—increases from one cycle to the next. "The result is that each subsequent cycle gets longer," Steinhardt says. Notre univers a-t-il connu plusieurs Big Bang ? LE BIG BANG - LES CLEFS DE L'UNIVERS.