These cosmic strings could stretch the length of the universe. A piece of this string only 1.6 kilometers long would weigh more than the earth. Others have added to the theory: That symmetry still ...

The answer lies in his theory of cosmic inflation ... I have been thinking about in the context of a paper that I’m writing with Sean Carroll [at Caltech]. The idea is that the universe ...

Evidence supporting this theory includes the cosmic microwave background, a faint "echo" of the universe's early expansion that scientists can study in detail. While the Big Bang Theory is widely ...

At any moment this second universe (or “membrane,” in M-theory—a relative of superstring ... particle physics and cosmic ...

Cosmic inflation is a faster-than-light expansion ... The first is that Einstein’s general theory of relativity famously makes mass bend space and time – so you’d expect a universe like ...