Homo Sapiens Human
<p>Jan 10, 2011 03:02 PM
 
Humans are probably most closely related to two chimpanzee species: <a title="Common Chimpanzee" href="/wiki/Common_Chimpanzee">Common Chimpanzee</a> and <a title="Bonobo" href="/wiki/Bonobo">Bonobo</a>.<sup id="cite_ref-Wood_22-1" class="reference"><a href="#cite_note-Wood-22">[23]</a></sup> 
Full <a title="Genome" href="/wiki/Genome">genome</a> sequencing has resulted in the conclusion that "after 6.5 [million] years of separate evolution, the differences between <b>chimpanzee and human are ten times greater than those between two unrelated peopl</b>e 
and <b>ten times less than those between rats and mic</b>e".<sup class="noprint Inline-Template" title="This sentence may contain perspectives and opinions without stating whose they are. from July 2010" >[<i><a title="Wikipedia:Attribution needed" href="/wiki/Wikipedia:Attribution_needed">attribution needed</a></i>]</sup> Suggested concurrence between the functional <b>human and chimpanzee DNA sequences range between 95% and 9</b>9%;<sup id="cite_ref-23" class="reference"><a href="#cite_note-23">[24]</a></sup><sup id="cite_ref-24" class="reference"><a href="#cite_note-24">[25]</a></sup><sup id="cite_ref-25" class="reference"><a href="#cite_note-25">[26]</a></sup><sup id="cite_ref-26" class="reference"><a href="#cite_note-26">[27]</a></sup> It has been estimated that the human <a title="Lineage (evolution)" href="/wiki/Lineage_(evolution)">lineage</a> <b>diverged from that of chimpanzees about five million years ago, and from that of </b><a title="Gorilla" href="/wiki/Gorilla"><b>gorillas</b></a><b> about eight million years ago</b>.
 
BIPEDAL LOCOMOTION:  an adaptation from an arboreal to a semi-arboreal one.
reduced upper body strength;  long legs;  valgus knees  (knock kneed).
 
Later, ancestral humans developed a much larger brain – <b>typically 1,400 cm³ in modern humans</b>, over <b>twice the size of that of a chimpanzee or gorilla.</b> The pattern of human postnatal brain growth differs from that of other apes (<a title="Heterochrony" href="/wiki/Heterochrony">heterochrony</a>), and allows for extended periods of social learning and <a title="Language acquisition" href="/wiki/Language_acquisition">language acquisition</a> in juvenile humans</p>