If you woke up feeling unusually refreshed this morning, that might be because you finally got enough sleep. The clocks went ...

Researchers found that when subjects slept during the day and were active at night, it had a negative impact on markers for ...

In order to better understand her circadian rhythm, science journalist Lynne Peeples conducted an experiment in which lived for 10 days in a bunker, with no exposure to sunlight or clocks.

When the clocks go back and we gain an extra hour, it might seem like a welcome bonus. But not for everyone. Night owls, those who naturally prefer staying up late and waking up late, often find ...

Phones have replaced many things: computers, calculators, cameras and maps. But returning to an old-fashioned alarm clock instead of your phone might help you get up and go in the morning.

Participants lived in a controlled environment over seven 28-hour sleep/wake cycles where all external time cues—including clocks and natural light—were removed.