• The root of the dilemma is the fact that all of the fundamental laws of physics – such as Einstein’s special and general relativity and Newton’s gravitation – work just as well if time is flowing forwards or backwards
  • Most physicists generally accept that this is why time moves forward – because at the birth of our Universe everything was extremely ordered, and so the direction of time is the same as the direction of increasing entropy
  • The new study suggests it may in fact be gravity, not thermodynamics, that controls the direction of time’s arrow.

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