The most recent measurement of a nearby galaxy cluster is deepening a disagreement about how fast the universe is expanding — ...

In the quest toward finding the correct theory of quantum gravity, physicists have been testing the holographic principle which, they say, is a key property of any valid theory of quantum gravity.

Researchers suggest powerful bursts from magnetars—collapsed stars with strong magnetic fields—may have contributed up to 10 ...

Astronomers have spotted something that appears to stretch around ten billion light years across. This so-called ...

Quantum ideas describe particles and fields in tiny packages, but general relativity paints gravity as smooth curves in space ...