by 
Anonymous
ANSWERS: 2
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Two diagnostic features are brain size and (more importantly) shape, and the flatness of the face. Australopithecines have been found with brain sizes between roughly 380 - 550 cc; Homo habilis have brain sizes of 500 cc at the low end, overlapping the high end of the australopithecines, but this smaller brain size was combined with a flatter, more upright face, smaller brow ridges, smaller teeth, and significantly, a different brain shape, demonstrating a bulge over "Broca's area", one of the areas crucial to speech.
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If the fossil was bonin' another fossil they call it homo. Homo w/ Erectus
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