Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that ...

Time feels like the most familiar thing in the world, yet it hides one of physics’ hardest questions: why do we only remember ...

Even if it turns out that time loops never take shape, studying them provides key insights into the deepest rules of reality.

Einstein’s famous tenet of special relativity — that time slows down on a moving clock — has been verified 10 times more precisely than ever before. The result comes from physicists in Germany and ...

Thanks to Einstein’s relativity, time flows differently on Mars than on Earth. NIST scientists have now nailed down the ...

Yesterday, I wrote about the core concepts needed to understand quantum physics, which is one of the two pillars of modern physics. The other, of course, is the theory of relativity, the full and ...

Denizens of Elizabethan England dismissed a short-lived sensation as a “nine days’ wonder.” Andy Warhol spoke of fame lasting mere 15 minutes. These days, a reality-TV star would be lucky to light up ...

Strangely, although we feel as if we sweep through time on the knife-edge between the fixed past and the open future, that edge—the present—appears nowhere in the existing laws of physics. In Albert ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Robert Lawrence Kuhn is the creator, writer and host of "Closer To Truth," a public television ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Albert Einstein's theory of general relativity has held up pretty well after a century out in the ...