Warp drives have long lived in the realm of science fiction, but the underlying physics that inspired them is very real and surprisingly precise. As researchers probe the edges of general relativity ...

A spacecraft traveling at 99 percent the speed of light toward Alpha Centauri would cross 4.3 light-years in what feels like ...

Predestination doesn’t waste time trying to explain the time travel technology, and it doesn’t need to, because it’s so coherent and straightforward, you naturally see that it makes sense right away.

Thirty years ago, the world of travel was a far simpler place. There were no online travel agents; there was no seat-back inflight entertainment or in-car GPS. Mobile phones were brick-like, and could ...