The story of animal evolution is marked by key innovations such as limbs for walking on land, wings for flight, and color patterns for advertising or concealment. How do new traits arise? How has the great diversity of butterflies, fish, mammals, and other animals evolved? The invention of insect wings and the evolution of their color patterns are beautiful models of the origin of novelty and the evolution of diversity. This lecture explores how new patterns evolve when "old" genes learn new tricks.
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