1. human brain
... last million years of the Miocene epoch. (Changeux and Chavaillon pg. 61). The fossils, especially those of the skull, from this time frame are limited. This leads to difficulty in proving differences in brain formation. Fossils of the hominoid cranium are not available until 2 million years after the proto-human lineage begins. The lack of cranial fossils for 2 million years is a ... . One study done by Ralph Holloway on the endocaste of the Hadar AL 162-68 skull fragment lead to a different theory regarding significant differences in brain functionality. Hadar "concluded that the luna...
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