Afarensis dating

09-Oct-2017 09:22

It had long been known that human beings physically resemble the primates more closely than any other known living organisms, but at the time it was a daring act to classify human beings within the same framework used for the rest of nature.Linnaeus, concerned exclusively with similarities in bodily structure, faced only the problem of distinguishing is a matter of active debate.In contrast, Lucy’s skeleton is 40 percent complete and dates to about 3.2 mya.Lucy’s pelvis is more humanlike, and the design of her knee joint suggests that she walked upright in a manner similar to that of modern humans.Since then the molecular data and a steady trickle of new hominin fossil finds have pushed the earliest putative hominin ancestry back in time somewhat, to perhaps 8–6 mya., based on a cranium from of Chad in north-central Africa.Announced in 2002, this specimen is dated to the period between 7 and 6 mya.

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This specimen also has small canine teeth compared with those of apes, thus aligning it with the hominins in an important functional regard.

No consensus has developed on exactly where this find fits into the human family tree (or, more appropriately, “family bush”), but, even if it is a hominin, it is highly unlikely to be a direct ancestor of , then, emphasizes an evolutionary pattern that seems to have been a characteristic of the tribe Hominini from the very start—a pattern that aligns it with what is observed in most other evolutionarily successful groups of mammals.