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Macintosh Picture Format  |  1996-09-10  |  11.6 KB  |  640x40  |  4-bit (8 colors)
   ocr: The Museum's diorama shows Australopithecus afarensis walking through volcanic ash at Laetoli, northern Tanzania, 3.5 million years ago. Their fossilized footprints are evidence that they walked upright. (Photo by D. Finnin)