News tagged with clock

Chronobiology—internal clocks in synch

Ludwig II of Bavaria is a particularly striking example of how differently people's internal clocks can tick. Historical sources tell us that the monarch usually carried out his government business at night and slept during ...

Oct 14, 2016
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Night shift work and breast cancer risk

Despite an assessment in 2007 indicating that night shift work was probably carcinogenic, data from three new studies and from a review of currently available evidence, published in the Journal of the National Cancer Institute, ...

Oct 06, 2016
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Could quality of sleep have to do with sex differences?

You may have noticed that women are more prone to sleep disturbances than men. They are, for instance, up to twice as likely to suffer from insomnia than men. Could there be a link between the body clock that regulates sleep ...

Sep 13, 2016
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Gut bacteria have own circadian clock

The circadian rhythm, or circadian clock, is an internal mechanism that drives the 24-hour cycles that tell our bodies when to sleep, wake and eat — and now, new research has found that bacteria living within the gut ...

Aug 08, 2016
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A clock is an instrument used to indicate, keep, and co-ordinate time. The word clock is derived ultimately (via Dutch, Northern French, and Medieval Latin) from the Celtic words clagan and clocca meaning "bell". A silent instrument missing such a mechanism has traditionally been known as a timepiece. In general usage today a "clock" refers to any device for measuring and displaying the time. Watches and other timepieces that can be carried on one's person are often distinguished from clocks.

The clock is one of the oldest human inventions, meeting the need to consistently measure intervals of time shorter than the natural units: the day; the lunar month; and the year. Devices operating on several different physical processes have been used over the millennia, culminating in the clocks of today.

This text uses material from Wikipedia, licensed under CC BY-SA

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