Physicist: The Universe Has Likely Been Expanding 'Eternally'

What if the universe didn't actually have a beginning?

. Instead of beginning with a Big Bang — more of a rapid expansion than an explosion — she suggests that the universe has no definite starting point. Instead, she says, it may have been expanding for all of eternity.The Big Bang hasn't actually been disproven, it's important to note.

But Prescod-Weinstein suggests that the universe was probably already growing even before that moment, in some unknown form. "There have been two changes to the way physicists think about this cosmological timeline," Prescod-Weinstein wrote in. "The first is that research on inflationary models, which study the exponential expansion of space-time, indicate that inflation may be an eternal process."

"As in, the universe may not have had a beginning moment, and we may live in what is called an eternally inflating universe," she continued, "one that was expanding exponentially even before what we call the big bang. Mathematically, this seems the most likely scenario — assuming inflation is correct."

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