multiverse

Physicists Weigh In: Could We Ever Travel to a Parallel Universe?

Physicists Weigh In: Could We Ever Travel to a Parallel Universe?

The multiverse is one of science fiction's most beloved conceits—travel far enough, or enter the right wormhole, and you can meet your alter ego in another universe.But granting parallel universes even exist, will we ever be able to reach them? Leading physicists weigh in with their own idiosyncratic thoughts—which are, as usual, highly entertaining.

Could cold spot in the sky be a bruise from a collision with a parallel universe?

Could cold spot in the sky be a bruise from a collision with a parallel universe?

Scientists have long tried to explain the origin of a mysterious, large and anomalously cold region of the sky. In 2015, they came close to figuring it out as a study showed it to be a “supervoid” in which the density of galaxies is much lower than it is in the rest of the universe. However, other studies haven’t managed to replicate the result.

Is Another Universe Sitting too Close to us on the Multiverse Bus?

Is Another Universe Sitting too Close to us on the Multiverse Bus?

Since the 1960s, astronomers have been aware of the electromagnetic background radiation that pervades the Universe. Known as the Cosmic Microwave Background, this radiation is the oldest light in the Universe and what is left over from the Big Bang. By 2004, astronomers also became aware that a large region within the CMB appeared to be colder than its surroundings.