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On the Origin of Phyla
James W. Valentine
Dr. James W. Valentine—widely recognized as one of the world's leading authorities on invertibrate paleontology and evolutionary paleobiology—Professor James Valentine's research tackels what many consider the most difficult and enigmatic problem facing neo-Darwinian theory: explaining the origin of phyla. Questions include: What are some of the major problems related to the origin of phyla? Is Darwinian gradualism consistent with the fossil record and the origin of phyla? Why is the Cell-Type Hypothesis a better explanation for the origin of phyla than are competing ideas?Program recording date & length: 1996 • 59 Minutes 45 Seconds
