Every day, everything only happen one way, never turn back to the original such as: If cups of coffee always are knocked to the floor, it become shards never spontaneously reassemble into the cups of coffee.
Some scientist and philosopher think the future might indeed affect the past due to an emergent property of quantum mechanics.
And In 2015, the researchers found evidence that the growth of entropy was from being reversible in time.
But the theory of quantum has proved that when 2 molecules are mixed, they are destroyed of orderliness which makes them loss of the information which cannot reassemble. It is the confirmation that time cannot backward in the past.