The hypothesis of effective evolutionary time attempts to explain gradients, in particular latitudinal gradients, in species diversity. It was originally named "time hypothesis".
Read more about Effective Evolutionary Time: Background, Historical Aspects, Recent Studies, Depth Gradients
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—Women’s Liberation Workshop, Students for a Democratic Society, Radical political/social activist organization. “Liberation of Women,” in New Left Notes (July 10, 1967)
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—Colin Welland (b. 1934)