A major international effort has produced an ultra-precise measurement of the Universe’s expansion rate, confirming it’s ...

Imagine we had somehow filmed the whole history of the universe and you could play the movie in reverse. It would start off much as things stand today: a vast and elegant web of galaxies and nebulae.

Relax, it’s only happening in theoretical physics—at least for now.

The universe is simply huge, containing billions of stars, planets, and galaxies. When children get to know the enormity of space, a question that comes to mind is, if the universe is so big, why have ...

New data from major dark-energy observatories suggest the universe may not expand forever after all. A Cornell physicist calculates that the cosmos is heading toward a dramatic reversal: after ...