Is time travel possible? According to physicists, yes. Time travel to the future is not only possible, it's been scientifically proven. But what about traveling to the past? Well, that's a little ...

But it did seem in principle possible ... space travel for Contact sparked a whole new direction in research on time travel. How does that make you feel? Hear Sagan via RealAudio Sagan: I find ...

Bob Hope and Bing Crosby did it over and over. Sometimes, though, the travel isn’t across the globe, or even across space. They are across time. Time travel has been an oft-used trope of science ...