Cosmology and quantum physics both offer tantalizing possibilities that we inhabit just one reality among many. But testing ...

Scientists have long pondered on one of the universe's greatest mysteries: Are we alone? They have searched the cosmos, but so far, there has been no sign of extraterrestrial life. Is it possible that ...

Add Yahoo as a preferred source to see more of our stories on Google. While parallel universes are a staple of science fiction, there are some real scientific theories to support them. But if parallel ...

While parallel universes are a staple of science fiction, there are some real scientific theories to support them. But if parallel universes do exist, could we ever travel to them? It certainly wouldn ...

The universe is expanding faster and faster, but not all scientists agree that dark energy is the cause. Perhaps, instead, our universe keeps colliding with and absorbing smaller 'baby universes,' a ...

The universe is a strange, beautiful place—rich with possibilities and governed by the odd rules of quantum mechanics. One of the most mind-bending ideas from this realm is the many-worlds ...

The largest-ever 3D map of the cosmos hints that the dark energy that’s fueling the universe’s expansion may be weakening. One community of theoretical physicists expected as much. On the morning of ...