Tracking time is one of those things that seems easy, until you really start to get into the details of what time actually is. We define a second as 9,192,631,770 oscillations of a cesium atom.

Time dilation, a captivating concept embedded in Einstein’s theory of relativity, has been experimentally validated on Earth. With the use of ultra-precise clocks, scientists have been able to ...

Sam Baron receives funding from the Australian Research Council. Spoiler alert: this article explains a key plot point, but we don’t give away anything you won’t see in trailers. Thanks to reader ...