A new theory published late last year is offering an explanation as to why our universe is expanding at an accelerating rate.

Whereas every other model of dark matter postulates a completely new particle, we don’t have to. That came as a huge surprise ...

According to this theory, the universe began as an infinitely small ... It was first predicted by Ralph Alpher and other scientists in 1948 but was found only by accident almost 20 years later.

There is zero evidence for other universes. So the biggest misconception about the multiverse is that it’s a bone fide theory that’s been proven. “It isn’t—it doesn’t really have a ...

Physicists have performed a simulation they say sheds new light on an elusive phenomenon that could determine the ultimate ...

String theorists are betting that extra dimensions do indeed exist; in fact, the equations that describe superstring theory require a universe with ... comprehend a space other than the two ...

Like stretch marks left on skin that expanded too quickly or cracks embedded in freezing ice, cosmic strings are artifacts of what the universe looked like in the moments before it rapidly changed ...

The other support LeMaitre used was the idea ... those supporting it and those who favored a "steady state" theory of the universe, in which the universe was eternal and unchanging.