It expresses a fundamental and simple truth about the universe ... “If your theory is found to be against the second law of thermodynamics I can give you no hope; there is nothing for it ...

The second law of thermodynamics demands that the entropy ... to be relevant in both stars and star clusters, and depends on a simple dynamic. If a gravitationally bound system has overall ...

However, interpretations that contravene the laws of thermodynamics, or at least require re-evaluation of fundamental tenets of bioenergetics, may serve to increase, rather than resolve ...

The grandfather paradox is just one of the thorny logical problems that arise with the concept of time travel. But one physicist says he has resolved them.