Physicists have performed an experiment that suggests time in our Universe may be directed by gravity, not thermodynamics, and that the Big Bang could have created two parallel universes - our own, in which time runs forwards, and a mirror one where time runs backwards.
Although the idea sounds pretty out there, the new hypothesis could help physicists solve some of their biggest issues with time - mainly the fact that they still can’t work out why it runs in only one direction.
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