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A good example of design by God in our 24 hour internal clock on my brothers site:

24 hour biorythym

[box type=”info”]A circadian rhythm is an endogenously driven roughly 24-hour cycle in biochemical, physiological, or behavioural processes. Circadian rhythms have been widely observed, in plants, animals, fungi and cyanobacteria (see bacterial circadian rhythms). The term “circadian” comes from the Latin circa, meaning “around”, and diem or dies, meaning “day”. The formal study of biological temporal rhythms such as daily, tidal, weekly, seasonal, and annual rhythms is called chronobiology. Although circadian rhythms are endogenous (“built-in”, self-sustained), they are adjusted (entrained) to the environment by external cues called zeitgebers, the primary one of which is daylight. http://en.wikipedia.org/wiki/Circadian_rhythm[/box]

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