Imagine a scenario in which you visit a friend’s home and, to your shock, discover a time machine sitting in her living room. After a few jaunts to check out some dinosaurs, stir up a little trouble ...

Have you ever made a mistake that you wish you could undo? Correcting past mistakes is one of the reasons we find the concept of time travel so fascinating. As often portrayed in science fiction, with ...

From the underrated Jake Gyllenhaal thriller Source Code to The Butterfly Effect, these forgotten time travel movies are ...

Cosmic strings are artifacts of what the universe looked like in the moments before it rapidly changed from a high-energy to low-energy environment—the Big Bang. Today, scientists believe cosmic ...

Fans of science fiction movies and TV know that behind aliens, space travel, and robots, time travel is, by far, one of the most beloved and often employed tropes of the genre. In fact, you could ...

A common theme in science-fiction media, time travel is captivating. It’s defined by the late philosopher David Lewis in his essay “The Paradoxes of Time Travel” as “[involving] a discrepancy between ...

In the movies, time travelers typically step inside a machine and—poof—disappear. They then reappear instantaneously among cowboys, knights or dinosaurs. What these films show is basically time ...