Thanks to a speed-up of Earth's rotation, the length of the astronomical day and the length of the clock day aren't quite ...

The latest edition of the World Heritage Map is now available to order! This new design, poster-sized wall map features all 1 ...

NASA's newest astrophysics space telescope launched in March on a mission to create an all-sky map of the universe. Now ...

“The optical clock community is strongly motivated to obtain the best possible set of measurements before the SI second is ...

Alabama spans a wide region, but every city, from Huntsville to Mobile, shares the same official time. Here's what time zone ...