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 problem. We do not know what took place during this time. The first available cranial fossils are those of A. afarensis. The mean endo cranial capacity was 413.5 cm3, which means that its brain size was that of today's African great apes (Changeux and Chavaillon pg. 65, table 4.1). With the limited fossils available and the apparent brain size of today's African great apes there is no proof of significant differences in brain funct

Some common words found in the essay are:
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Approximate Word count = 1006
Approximate Pages = 4 (250 words per page double spaced)