Physicist Alan Guth, the father of cosmic inflation theory, describes emerging ideas about where our universe comes from, what else is out there, and what caused it to exist in the first place.

The rest of the debris from the collision, theory suggests, coalesced in Earth's orbit, forming the moon. For this new study, the team in California used computer models to show what sort of ...

such as near black holes or during cosmic events like the collision of neutron stars, the effects of gravity can be significantly different and would require Einstein's theory of general ...