Perhaps you saw the news this week about new evidence that we do, indeed, live in a multiverse. A scientist claims he’s found signs in the cosmic microwave background radiation — the afterglow, so to speak, from the Big Bang — that our universe collided with another universe early in our cosmic history.

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.

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?

Andy Murray’s unexpectedly strong start against Roger Federer in the Wimbledon 2012 final put the Daily Telegraph columnist Matthew Norman in a science-fiction mood. Contrasting Murray with the doubles champion Jonny Marray — who still rents a flat and drives a Ford Fiesta, despite holding a Grand Slam title — the …

Parallel universes are basically the most popular trope in science fiction, because Batman and Spider-Man in alternate universe costumes are awesome, and also human existence is inherently full of awful, soul-crushing regret. But how does the science actually work?

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.

Here's a TED talk you must watch: Brian Greene explains why there is a multiverse, the theory that we live in one of many different universes. All to answer this question: Why do we humans find ourselves existing in our universe?

"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."

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.

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.

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.

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…

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…

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.

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.

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.

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.

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.