Discover the inner workings of an "atomic clock," which harnesses quantum physics to keep exact time: | NOVA l PBS

4K views · 74 reactions | How do people around the world keep time together? They use atomic clocks. These remarkable devices tap into frequencies hidden in the hearts of atoms to produce astoundingly stable, accurate ticks of time – far better than any other kind of clock. This animation explains why we use atoms to keep time and how they keep us all on the beat. | National Institute of Standards and Technology (NIST) | Facebook