Dubbing these “closed timelike geodesics” (CTGs), Ralph and Sajeendran explain in the paper: “Such a CTG would be ideal for ...

Our editors and experts handpick every product we feature. We may earn a commission from your purchases. What makes time-travel books so fascinating? A key genre of the science fiction ecosystem, ...

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 ...

There’s little more satisfying than a solid sci-fi series, except perhaps a sci-fi series that brilliantly explores the concept of time travel. Any sci-fi fan can tell you that not all time travel ...

Time—ravager of youth; spoiler of milk; humanity’s oldest and deadliest foe. Yet in films we can conquer time easily: running it forwards and backward, skipping into the future or past with a simple ...