Science Museum, London
Science Museum: Atomic Clocks
The first atomic clock was designed by Louis Essen in 1955. Find out about how it works and how atomic clock technology has developed.
TED Talks
Ted: Ted Ed: What if the Earth Stopped Spinning?
Michael Stevens of Vsauce looks at what would happen if the Earth stopped spinning. He also explores how we construct time as a function of the Earth's rotation and why atomic clocks are so precise. [9:44]
US Navy
United States Naval Observatory Homepage
United States Naval Observatory is a unique observatory run by the Navy. It does some of the grunt work of astronomy -- keeping accurate time, determining positions of stars (astrometry), etc. They are responsible for publishing the...
American Museum of Natural History
American Museum of Natural History: Time O Logy Card
Flip over this interactive OLogy card to find short overviews, fact-or-fiction questions, and similar bite-size bits of information about the nature of time, time travel, atomic clocks, and the general theory of relativity.