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Macintosh Picture Format  |  1996-09-10  |  191.0 KB  |  640x310  |  8-bit (198 colors)
   ocr: Evolution4 the somewhat squirrellike Plesiadapis, an archaic primate that lived sixty million to fifty-three million years ago, is shown in the region that today is Wyoming. Plesiadaps and its relatives had curiously enlarged front teeth, but their chewing teeth were like those of primates. Their flatter molars suggest that these animals had turned away from a primitive diet of insects toward one that may have included a great deal of fruit. This is follow- 1 ed by Notharctus, which lived approxi- mately forty-eight million years ago. Notharctus was a 5 8