"If it is true that an influx of doubt and uncertainty actually marks periods of healthy growth in a science, then evolutionary biology is flourishing today as it seldom has flourished in the past. For biologists collectively are less agreed upon the details of evolutionary mechanics than they were a scant decade ago. Superficially, it seems as if we know less about evolution than we did in 1959, the centennial year of Darwin's on the Origin of Species."

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Source : Niles Eldredge (2014). “Time Frames: The Evolution of Punctuated Equilibria”, p.14, Princeton University Press

Niles Eldredge

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