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basic rest-activity cycle

A biological rhythm of waxing and waning alertness with a period of approximately 90 minutes in humans. During sleep it controls the cycles of REM and slow-wave sleep. Also called the ...

South and Central Asia

South and Central Asia   Quick reference

A Dictionary of World Mythology

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...out in stark contrast with the rest of the world. For though the world cycles of Hinduism are subdivided in four yugas or ages, not unlike the Greco-Roman ages of gold, silver, brass, and iron, they follow each other in the apparently endless stream of time. The wheel of birth and death, reincarnation, encompasses the individual, the species, the social structure, the planet, the gods, the universe: it is the timescale of Nature herself. Endless, irreversible, unquenchable are the processes of alteration and change. The cycle of emanation, fruition,...