Cetaceans (whales, dolphins, and porpoises) have fascinated and
bewildered humans throughout history. Their mammalian affinities
have been long recognized, but exactly which group of terrestrial
mammals they descend from has, until recently, remained in the
dark. Recent decades have produced a flurry of new fossil
cetaceans, extending their fossil history to over 50 million years
ago. Along with new insights from genetics and developmental
studies, these discoveries have helped to clarify the place of
cetaceans among mammals, and enriched our understanding of their
unique adaptations for feeding, locomotion and sensory systems.
Their continuously improving fossil record and successive
transformation into highly specialized marine mammals have made
cetaceans a textbook case of evolution - as iconic in its own way
as the origin of birds from dinosaurs. This book aims to summarize
our current understanding of cetacean evolution for the serious
student and interested amateur using photographs, drawings, charts
and illustrations.
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