There are plenty of ideas as to how the universe began, but how will it end? Chances are it won't go on existing for eternity. Billions of years after we're gone (if we're lucky), what exactly will happen to the stars and galaxies we know? Here are four possibilities — some scarier than others.
The Big Crunch
The Big Rip
What Does Dark Energy Really Do?
Written by Ashley Hamer August 3, 2018
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