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

What does it mean to be to space-time? The seemingly simple question gets to the essence of twentieth-century physics and has driven a hundred-year debate between philosophy and science. In Einstein’s ...

TIME marches on, rushing through the seasons, dashing through the rain, plowing through the mist, blowing through the summer. I went to bed sometime around 1972 and awoke to 2006. Where did all my ...

An artist's visualization of the star S0-2 as it passes by the supermassive black hole at the galactic center. As the star gets closer to the supermassive black hole, it experiences a gravitational ...

In the gloomy days of January, time seems to drag. According to the Einstein theory of relativity, it actually does—in a minute amount that means little to anyone except a scientist. During its annual ...

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 ...

Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Currently, there is a variety of undeniable signs cropping up around me that indicate I’m ...

In his 1986 book, Was Einstein Right? Prof. Clifford Will, physics, Washington University in St. Louis, declared anyone who questioned Albert Einstein’s special theory of relativity to be a crank or ...