Good news, everyone! A new interpretation of string theory is proposing that Boltzmann Brains — those disembodied brains that could emerge spontaneously in outer space — will never outnumber humans.

For 14 years now, the American Museum of Natural History has hosted the Isaac Asimov Memorial Debate – an annual meeting of scientific and philosophical minds, held in honor of one of modern history's most formidable intellects. The debates are always fantastic, but this year's topic – the existence of nothing –…

Cosmologists have been thinking for years that our universe might be just one bubble amid countless bubbles floating in a formless void. And when they say "countless," they really mean it. Those universes are damned hard to count.

SciAm's George Musser takes a crack at explaining one of the most complex (and controversial) concepts in all of physics — all in less than 26 seconds. Not bad, Musser. But can you do it for M-theory? What about those 11 dimensions of vibrating strings?

There's a spat brewing between some theoretical physicists and philosophers of science recently, and NPR's Adam Frank has all the details. It started when one philosopher of science, David Albert, questioned the notion that the universe came "from nothing," as the title of Laurence Krauss' new book claims. This quickly…

Particle physics is to physics what big game hunting is to field biology. While theoretical physicists pore over their mathematical models, particle physicists are out in the brush with their pith helmets and shotguns, speaking softly, carrying big accelerators and blowing stuff up real good.

The recent announcement that neutrinos had been observed seemingly going faster than the speed of light sent shockwaves through the physics community. But there's one possible explanation that could keep Einstein's relativity intact and open up a whole new cosmos.

One of the strangest and most exotic theories to come out of theoretical physics is that the entire universe is a projection of a two-dimensional shell. But the latest evidence suggests the cosmic hologram really is just a crazy theory.

Physicists have long studied the nature of the universe. But some go a step further into the unknown (and probably unknowable), contemplating what lies outside the boundaries of our universe.

A crucial goal for the Large Hadron Collider is to find the long-sought Higgs boson. It might also create another Higgs particle that only travels through hidden dimensions, meaning it can pop in and out of any point in time.