Description
Offers an examination of the twin evolution of the earliest marine life--one branch that came ashore and evolved into turtles, dinosaurs, and eventually humans; and the other that crept back into the water and become whales, dolphins, and other underwater life
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Discusses the history of evolutionary science as it relates to current knowledge of the transformation of body types through evolution. Focusing primarily on the emergence of the first land creatures 360 million years ago and the later return to the sea of the ancestors of whales and dolphins some 60 million years ago, the author uses findings from paleontology, ecology, genetics, and embryology to explain broad mechanisms of speciation. Annotation c. by Book News, Inc., Portland, Or.
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