"Time is a flat circle" may be the most famous quote to emerge from HBO's True Detective. But putting the memes aside, here's ...

Einstein’s theory of relativity has inspired a model called the Block Universe, where all of time exists simultaneously. Physicists argue that our sense of time moving forward may just be an illusion ...

The mind-bending concept of time dilation results from a seemingly harmless assumption—that the speed of light is the same ...