The Geochron World Time Indicator is a clock that doubles as a live map of where the sun is shining on the Earth. Back in its day, it was a cult piece that some have dubbed the “Rolex on the ...

The U.S. Navy began using the 24-hour clock in 1920, after becoming familiar with it during World War I. The U.S. Army didn't officially adopt military time until 1942. Be sure to get the latest ...