Imagine a clock that doesn’t have electricity, but its hands and gears spin on their own for all eternity. In a new study, physicists at CU Boulder have used liquid crystals, the same materials that ...

Ripples in time and space A time crystal as seen under a microscope. (Courtesy: Zhao & Smalyukh, 2025, Nature Materials) A new type of “space–time crystal” has been created in the US by Hanqing Zhao ...