News tagged with clock

Astrocytes found to keep time for brain, behavior

Until recently, work on biological clocks that dictate daily fluctuations in most body functions, including core body temperature and alertness, focused on neurons, those electrically excitable cells that are the divas of ...

Mar 24, 2017
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Is the dark really making me sad?

The inhabitants of Rjukan in southern Norway have a complex relationship with the sun. "More than other places I've lived, they like to talk about the sun: when it's coming back, if it's a long time since they've seen the ...

Mar 14, 2017
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Clock

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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