Your mobile phone, car navigation systems, bank trading platforms, internet infrastructure and even military devices all share one thing in common: the time they use originates from the U.S. Naval Observatory's Time Services.

In this video from The Atlantic, Dr. Demetrios Matsakis—Chief Scientist for the USNO's Time Services—gives a guided tour of the atomic clocks that keep the world ticking. It's fascinating stuff. [The Atlantic]