Military time, also known as the 24-hour clock, is a system the military uses to eliminate confusion between morning and afternoon hours, since the armed forces are in operation around the clock.

A new study in Physical Review Letters has used atomic clocks to study relativistic effects in interacting quantum systems.

The study reveals that both immune system activity and digestive functions follow daily rhythms governed by the circadian clock. Disruption of this internal timing system has been linked to ...

This internal clock is influenced by external cues, like sunlight and temperature, which help determine whether one feels energized or exhausted at different times of the day. Circadian rhythms ...

Here are some of the poll's other findings: 54% favored setting clocks at daylight saving time once and for all. 21% backed permanent standard time. 18% prefer keeping the current system.

While springing the clocks forward “kind of jolts our system,” the extra daylight gets people outdoors, exercising and having fun, said Anne Buckle, of timeanddate.com. “The really ...