Besides quantum mechanics, another interesting topic in physics is relativity. Let’s take a look at it! Of all the force fields, the gravitational field is the one man has known for the longest time.

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

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

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

Scientists, or at least their wild-haired fictional counterparts, promised us time travel and still have not delivered. Forget walking with dinosaurs or killing baby Hitler; I’d be happy just to warn ...

"The past is obdurate," Stephen King wrote in his book about a man who goes back in time to prevent the Kennedy assassination. "It doesn't want to be changed." Turns out, King might have been on to ...

Our curiosity about time travel is thousands of years old. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Time travel makes regular appearances ...

Living in a rotating universe would be strange indeed. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. We know that planets rotate, but what ...

If general relativity, Einstein's theory of gravity and space-time, allows for the ability to go back in time and kill your grandfather, asks David Z. Albert, a physicist and philosopher at Columbia ...

Look, we’re not totally ignorant about time. We know that the dimension of time is woven together with the three dimensions of space, creating a four-dimensional fabric for the Universe. We know that ...

Time travel has been a fantasy for at least 125 years. H.G. Wells penned his groundbreaking novel, The Time Machine, in 1895, and it’s something that physicists and philosophers have been writing ...