To many [dark energy] is the greatest challenge facing modern cosmology.

Now the rift between the time of physics and the time of experience is reaching its logical conclusion, for many in theoretical physics have come to believe that time fundamentally does not even exist.

Black holes came first and somehow―we don’t know how―grew the galaxy around them.

Simply put, we do not know what a quantum spacetime means.

[T]eaching people a new way of talking about time gives them a new way of thinking about it.

… the coach builders will soon be called upon to make closed bodies for aeroplanes the same as they do for automobiles ….

Nonlocality implies that a fist in Des Moines can break a nose in Dallas without affecting any other physical thing (not a molecule of air, not an electron in a wire, not a twinkle of light) anywhere in the heartland.

The kind of nonlocality one encounters in quantum mechanics seems to call for an absolute simultaneity, which would pose a very real and ominous threat to special relativity.