This mind-bending physics breakthrough could redefine timekeeping

By using a clever quantum approach that involves two "hands" on a clock one moving quickly and invisibly in the quantum world, the other more traditionally scientists have found a way to boost timekeeping precision dramatically. Even better, this trick doesn't require a matching increase in energy use. The discovery not only challenges long-held beliefs about how clocks and physics work, but could also lead to powerful new tools in science, technology, and beyond.