The Big Brake is a theoretical scientific model suggested as one of the possibilities for ultimate fate of the universe. The effect of Dark Energy reverses, stopping the accelerating expansion of the Universe, and causing an infinite rate of deceleration. All cosmic matter would be subjected to tidal forces of infinite strength and get destroyed. Another possibility is matter may still exist albeit in a different form and organization. The consequences for time are also unclear.
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Big Brake Wikipedia(Text) CC BY-SA