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Biology, 19.02.2020 04:54 tynyiaawrightt

Niles Eldredge and Stephen Jay Gould researched the lenses of the eyes of fossil trilobites of different species. In 1972 they published a paper in which they described the tendency of a species to remain the same until a sudden change in the environment causes a new related species to appear.

Does this support the idea of gradual development of species or sudden changes in species?

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