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

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

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

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

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

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