Without a Tardis, a journey to the center of the Earth might be your best option for traveling to the past. Because of the way gravity warps spacetime, physicists have now calculated that the Earth’s core is 2.5 years younger than its surface.
When life gives you lemons, make lemonade, right? That, at least, is the motto the European Space Agency seems to have embraced with respect to two wayward satellites, which are being repurposed to provide the most accurate assessment yet of how gravity affects the passage of time.
Stephen Hawking makes headlines with every utterance, whether he is making bets with colleagues, attending movie premieres, expounding on A.I., or slyly suggesting women are the ultimate mystery. Now he’s inspired a lyrical sonnet ruminating on relativity, quantum mechanics and (of course) black holes.
Light speed is often spoken of as a cosmic speed limit … but not everything plays by these rules. In fact, space itself can expand faster than a photon could ever hope to travel.
On Friday Digital Einstein went live, bringing with it a treasure trove of Einstein letters, correspondences, postcards, and notes detailing the life of one of the world's greatest thinkers. As The New York Times reports, these are The Dead Sea Scrolls of physics and you can read them today for free.
Time travel's been one of man's wildest fantasies for centuries. It's long been a popular trend in movies and fiction, inspiring everything from Charles Dickens' A Christmas Carol to H.G. Wells' The Time Machine to the Charlton Heston shrine that is The Planet of the Apes. And with the opening of Interstellar…
Time travel is possible—or at least a lot of serious physicists say so. It's probably not possible to pull it off in a souped-up Delorean, but there are wormholes, Tipler cylinders, and other Einstein-inspired theories for how it could work. Which raises the question: Why haven't we met any visitors from another time?
Somebody's going to win a Nobel Prize. At least that's what the physics community is saying after the announcement on Monday that a Harvard team has found the first direct evidence of cosmic inflation right after the Big Bang. It's more proof that the Big Bang really was the beginning of it all.
You're sitting still, right? Wrong. When it comes to how fast you're moving right this instant, everything is relative.
String theory a beautiful, elegant piece of science which claims to unify all the forces in the Universe by representing tiny point-like particles as one-dimensional vibrating strings. It's as clever as it is wacky but is—conveniently—untestable. Until, perhaps, now.
Of all the the mind-bending, unfathomable pieces of art to choose to recreate in Lego, surely anything by Escher must be the hardest, with all its impossible stairs, bridges and passageways. Still, that didn't stop Riccardo Zangelmi from trying.
Our modern understanding of reality is based on some fundamental concepts: that the world around us is tangible, that the theory of relativity holds, that cause and effect works as we'd expect, and that humans have free will. But take quantum theory at face value, and it turns out the four can't co-exist together.
A team of scientists is claiming to have achieved the seemingly impossible: it's managed to create a nanoscale device which allows light to travel infinitely fast. But how the hell did they do it, and what does it mean?
Everyone thinks it would be cool to travel at the speed of light, which is why scientists devote their lives to working out if it would be possible and NASA is trying to develop its own warp drive. But easy, tiger: turns out super-fast space travel would be fatal.
According to Einstein's special theory of relativity, light traveling in a vacuum is the universal speed limit. But scientists love to try and break rules—and now a tweaked version of Einstein's equations suggests that faster-than-light travel might just be possible.
Like a beach chair sagging under a sunbather's weight, the fabric of spacetime does indeed warp around the mass of the Earth - just as Albert Einstein predicted. And like a swimmer moving through the water, the rotation of the Earth affects the movement of spacetime itself. A gravity probe whose origins date to the…
Einstein's Twin Paradox is super confusing for me, every time I think I fully understand it, I find more questions. The Twin Paradox is a thought experiment in special relativity when one twin travels to outer space while the other twin stays on Earth. When the space bound twin lands back on Earth, he'll find that…
"Modeled" on Einstein's theory of relativity, this Relativity Watch actually makes the numbers move instead of the hands. This, of course, makes you dizzy if you continuously stare at it for more than 12 hours.