Does Our Universe Bear the Scars of a Collision with Another Universe?

Though many physicists believe it's possible that our universe is one of many in a multiverse, they struggle to find concrete evidence to back up that hypothesis. But now, we may find that evidence — if we look for the wreckage left behind by a collision of cosmic proportions. » 11/11/14 5:30pm 11/11/14 5:30pm

It's Looking More and More Likely That We Live in a Multiverse

Could our massive universe be just one of many, like a bubble in a frothy stream of cosmos-spawning stuff? It sounds like something out of a 1970s British scifi novel, but it's become a popular explanation for the origin of our universe. But how can we test this hypothesis, when we're stuck in just one universe? » 11/03/14 3:20pm 11/03/14 3:20pm

New Terry Pratchett Novel is a Series of Tubers

Sir Terry Pratchett first came up with the idea of the Long Earth multiverse back in 1986. He set it aside to focus on Discworld. The 75 million copies sold of those wildly popular fantasy novels would indicate that this was a pretty good idea. Even the Queen of England agrees. » 6/12/12 3:00pm 6/12/12 3:00pm

What's In a Number: Unravelling a Multiversal Paradox

"Since there is an infinite number of alternative universes, there must be one in which there isn't an infinite number of alternative universes. Perhaps this is the one." » 4/12/12 11:00am 4/12/12 11:00am

Quantum Suicide: How to Prove the Multiverse Exists, in the Most…

Quantum mechanics says objective reality doesn't exist, that instead all we see are probabilities collapsing into one particular configuration... and all other possible realities might just exist together in a quantum multiverse. Here's the deadly experiment that could help you to test that very idea. » 3/08/12 3:07pm 3/08/12 3:07pm

Must Watch: An Out-of-Character Stephen Colbert Interviews Neil…

This is excellent. Back in 2010, an out-of-character Stephen Colbert sat down with astrophysicist Neil deGrasse Tyson at Montclair Kimberly Academy to talk for 90 minutes about science, society and the universe. Yesterday, the Hayden Planetarium posted the interview on its website for all to watch. » 11/28/11 12:59pm 11/28/11 12:59pm

Physicists and mathematicians discover a way to save time - literally

In order to calculate odds in a multiverse, a certain conceit has to be thrown down which 'ends time' for certain universes. This means that, conceptually at least, universes are destroyed. And so a group of intrepid theorists set out to save universes by saving time, and may have discovered a way to do it. » 8/12/11 7:00am 8/12/11 7:00am

A test for multiple universes finds four . . . maybe

Multiple universes are accessed, in fiction, through portals in space or mystical necklaces or sometimes just in dreams, but always when characters break the rules of space time. In reality, alternate universes are not in other dimensions. They're just far, far away. And the reason they are alternate universes is that… » 8/04/11 1:20pm 8/04/11 1:20pm

Ten Alternate Earths

Everybody knows about the multiverse, where there are an infinite number of realities that our heroes can visit using the power of their minds or whirly light technology. But then there are the stories that stick close to home, giving us an alternate Earth where our doubles live happier lives despite having no coffee… » 7/18/11 10:41am 7/18/11 10:41am

Travel the multiverse with “Curvy,” meet interesting people, and have…

Webcomic Curvy is a romp through a gimmick-laden multiverse of erotica. The protagonist Anais travels to strange worlds with the licorice-flavored princess named Fauna and encounters candy tentacles, transspecies pirates, human furniture, and some literal sexual healing. » 7/09/11 7:00am 7/09/11 7:00am

In the multidimensional suicide support group, you are your own…

Cura Te Ipsum is an emotional crisis on infinite earths. Charlie Everett tries to kill himself only to be stopped by himself. Soon he's on a multiversal trek, where his alternate selves want to heal – or kill – him. » 3/12/11 10:00am 3/12/11 10:00am

Does our universe show "bruises" where it collided with other universes?

The eternal inflation model says that there's an infinite number of universes, with new universes constantly popping into existence and expanding outwards. Every so often, these new universes might collide. Our universe has four "bruises" possibly caused by these collisions. » 12/17/10 3:30pm 12/17/10 3:30pm

The universe might have to end in 3.7 billion years so that the laws of…

The laws of physics only work in a finite universe, but we likely live in an infinite multiverse. Resolving this discrepancy could mean a 50-50 chance time will end in 3.7 billion years. Yeah, this one's going to get weird. » 10/17/10 11:30am 10/17/10 11:30am

Why are past, present, and future our only options?

In this week's "Ask a Physicist," we're going to figure out why the universe we inhabit isn't Flatland, Tesseractland, or Doubletimeland. Or, at very least, we're going to figure out why those worlds would suck at harboring complex life. » 10/06/10 9:15am 10/06/10 9:15am

A tour through the Xenutian pubs and kitten holes of the multiverse

The multiverse is a wacky place. When people aren't trying to uplift their hamsters, they're playing pranks on Scientologists or hauling their kids off to that geyser that spews sky kittens. Scenes from a Multiverse is a goofy, pandimensional tour. » 7/10/10 10:00am 7/10/10 10:00am

Is there an evil, goateed version of you somewhere in the multiverse?

In this week's "Ask a Physicist" we figure out whether there's a universe out there with another version of you, and whether you could kill her and take her place. » 6/29/10 8:40am 6/29/10 8:40am

It's a Wonderful Life Takes a Trip Through the Multiverse

If you've grown bored of watching It's a Wonderful Life for the hundredth time, then perhaps it's time to read Robert Reed's twist on the classic film. In "A Woman's Best Friend," Clarence isn't an angel but a dimension-hopping hoaxster. » 12/23/09 1:10pm 12/23/09 1:10pm

Music Videos of the Multiverse Apocalypse and the History of the Planet…

Director Sugimoto Kousuke creates action-packed, animated music videos overloaded with colorful visuals and global disasters. His "The TV Show" goes from hypnotically zen to multiversal meltdown, while "Full Moon Party" chronicles the rise and fall of civilization starring monkey kind. » 12/08/09 3:50pm 12/08/09 3:50pm

How Many Universes Exist in the Multiverse? Physicists May Have a Number

If we do, in fact, live in a multiverse, with multiple universes arising out of the Big Bang, how many are there? Andrei Linde and Vitaly Vanchurin at Stanford University have been working to calculate a number, based on quantum fluctuations in the early state of the universe. Their tally indicates that there are at… » 10/15/09 11:10am 10/15/09 11:10am

Bad Boys of the Multiverse: An Alternate Universe Reading Guide

Have we gone multiverse crazy? Iain Banks' latest novel, Transition, is just the latest of a long line of sideways-traveling books, and this theme is more prevalent than ever. Here are some of my favorites, with spoilers and foul language. » 10/02/09 3:20pm 10/02/09 3:20pm