From candles that drop metal nails to the knocker uppers of industrial Britain, people devised plenty of cunning ways to ensure a timely wake-up before alarm clocks came along.

Complacency about the serious challenges the world is facing is not an option. But the idea that we are almost at the point ...

From candles that drop metal nails to the knocker uppers of industrial Britain, people devised plenty of cunning tricks to ensure a timely wake-up before alarm clocks came along.

Satellite navigation systems underpin modern society, supporting aviation, transportation, telecommunications, and scientific ...

Research shows the fall switch to Standard Time causes a deeper mood slump than the spring jump into Daylight Saving Time.

If you didn’t prepare for Daylight Saving Time, your sleep schedule may be off. CNN wellness expert Dr. Leana Wen offers ...

DST continues to spark debate as Americans remain divided over whether to keep changing their clocks each year.

Do SAD lamps work? Experts explain how to beat the winter blues - Light therapy has grown in popularity, with plenty ...

Don’t try to force yourself into being a morning person. Trick yourself into it instead with a sunrise alarm clock.

As clocks spring forward, light and movement are cues for daytime wakefulness that can improve sleep and overall health ...

Gravitational waves may leave a permanent timing gap in light, revealing how gravity preserves information through a memory ...

Earthlings, brace yourselves: the galaxy may be emptier than your last Tinder date. According to a new study, any alien civilizations out there? Probably short-lived — and doomed to fail spectacularly ...