The internal mechanism by which such a rhythmic phenomenon occurs and is maintained even in the absence of the apparent environmental stimulus is termed a biological clock.
When an animal that functions according to such a clock is rapidly translocated to a geographic point where the environmental cycle is no longer synchronous with the animal’s cycle, the clock continues for a time to function synchronously with the original environmental cycle.
Humans similarly transported over great distances often experience
fatigue and lowered efficiency for several days, a phenomenon known as “jet lag,” or jet syndrome...<<<Read More>>>...