The universe began in a Big Bang about 13.7 billion years ago and has been expanding at an ever accelerating rate ever since.
According to standard cosmology models the most likely outcome for the universe is that it will expand forever.
But a team of physicists led by Raphael Bousso from the University of California, Berkeley, claim their calculations show the universe will end.
By introducing [an arbitrary cut-off for the average life of a universe], they say there is "a 50-50 chance of the universe ending in the next 3.7 billion years."
(ABC, 8 October 2010)
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