Herbert Spencer, by D.G. Thompson.--Charles Robert Darwin, by J.W. Chadwick.--Solar and planetary evolution, by G.P. Serviss.--Evolution of vegetal life, by W. Potts ...

From comparison of the eyes of lampreys and jawed vertebrates, it is clear that a 'vertebrate-style' camera eye was already present in the last common ancestor of these taxa, around 500 million years ...

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