Physicists have developed an atomic clock so accurate that it would be off by less than a single second in 14 billion years. That kind of accuracy and precision makes it more than just a timepiece. It’s a powerful scientific instrument that could measure gravitational waves, take the measure of the Earth’s gravitational shape, and maybe even detect dark matter.How did they do it?

— Read on curiosity.com/topics/physicists-have-developed-a-ridiculously-accurate-atomic-clock-curiosity

Uber cool 😎