An article in National Geographic defines the multiverse as “a term that scientists use to describe the idea that beyond the observable universe, other universes may exist as well. Multiverses are predicted by several scientific theories that describe different possible scenarios—from regions of space in different planes than ourread more

Ever since astronomers Konstantin Batygin and Michael Brown hypothesized in 2016 that an undiscovered planet hidden in the far reaches of the solar system was responsible for the odd orbits of the dwarf planets that lurk there, astrophysicists have searched in vain for this enigmatic ninth planet. But other theories have alsoread more

In theoretical physics an Einstein-Rosen bridge—more commonly known as a wormhole—is a structure connecting two points in spacetime that can, at least under the right circumstances, offer a shortcut between those two points in space, with the apparent distance through the tunnel being shorter than the distance between the locationsread more