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A terasecond (Ts) is 1012 seconds, or 10,000,000,000,000 seconds, and is also 32,000 years. In the history of the universe, there has been about 509,375 teraseconds. 31.6 teraseconds compose an eon. Cro-Magnons, the closest species to modern humans, settled in Northern Europe approximately 1.25 teraseconds ago. The half-life of nickel-59 is about 2.375 teraseconds, of 76,000 years.

gigasecond (32 years)<---terasecond--->petasecond (32,000,000 years)

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