When Will It be 'Game Over' For the Universe?

Some say the universe will end in fire. Some say ice. Or maybe not.

RELATED TAGS: COSMOLOGY, PHYSICS, DARK MATTER
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Cosmology deals with the big questions of the universe, often the same questions that keep philosophers up at night. When did the universe begin? How did it start? Has the universe always been expanding? (For the record, the answers are: about 13.8 billion years ago, in a high-density state that rapidly expanded called the Big Bang and yes, but not always at the same speed.) But here’s a question they haven’t figured out yet: How’s it all going to end? It’s a big quest...
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