Nuclear clocks could upgrade our most advanced, state-of-the-art atomic clocks by a factor of ten, which means they would potentially drop one second every 300 billion years. Compared to the power of optical atomic clocks, which are estimated to drop just one second every 30 billion years, that difference doesn’t seem like it would matter. However, the real-world impacts alone will be huge, including improved earthquake detection and satellite navigation systems. Beyond improving our day-to-day life, these more precise clocks could also help reveal the fundamental workings of our universe.