These things never happen, and it's all thanks to the ... this defining arrow of time does not appear to be there, or at least looks the same in both directions. In glass and plastic, though ...

We have memories of the past rather than the future, and spilled water doesn’t flow back to its cup, just as an arrow that ... the universe to go in the other direction.” ...

The direction of time seems pretty obvious; it goes from the past towards the future, though the reason why that is the case is unclear. This arrow of time ... apply to all disordered materials ...

Its flow marks the progress of our lives, moving clearly in one direction. It is, by nature, asymmetrical. In this way, we perceive it to move like an arrow ... clock would go the other way ...

Equations that determine the acceleration of a rocket or the momentum of a billiard ball all work just ... There is a distinct arrow of time pointing in one direction. For nearly 140 years ...