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Introduction: A New View of the Evolution of Animals
Cnidarians: Deep Sea Research
Paleontology: Paleontologists Study Fossils
Paleontology: Paleontologists Study Tracks and Traces
Paleontology: New Evidence Revises Thinking, Anomalocaris
Taxonomy
Ultimate Animal
Arthropod Locomotion: Engineering
Bilateral Body Plan
Cambrian Explosion
Genetics: Genes Tell Us About Evolution
Genetics: How Genes Direct Development
Human Body Plan
