A quantum stopwatch that measures time by avoiding all except one final measurement would be the most accurate allowed by nature, suggests a new study. To measure the time taken by a series of ...

The stopwatch is a big part of CrossFit and other “functional fitness” circuit-training programs: Timed workouts (and WODs, in CrossFit speak) allow athletes to measure their performance ...

NASA scientists have developed a stopwatch timer that can measure within a fraction of a billionth of a second, an advance that can help record precise height measurements of sea ice, glaciers ...