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, ...

Time is all around us: in the language we use, in the memories we revisit and in our predictions of the future. But what exactly is it? The physicist and Nobel laureate Frank Wilczek joins Steve ...

Could the observable universe be exclusively composed of layered, mutually entangled systems? The passage of time puzzles quantum physicists, who seek to fit it into a cohesive model. One wild theory ...

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 ...