Our lineage’s fossil record is especially sparse between 4 – 8 million years ago. From that time period we have roughly 50 fragmented specimens making up only 6 or so individuals. I
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Culture has long been proposed to be a distinguishing feature of the human species. However, an increasing amount of evidence from the field has shown that in several animals, differences in behaviors between populations actually reflect the presence of culture in these species. CHIMPANZEES: http://www.scoop.it/t/science-news?tag=chimps 
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(PhysOrg.com) -- By setting up a unique experiment, a small team of researchers has found that chimpanzees are able to understand need in other chimps, despite their general disinclination to offer aid when they see it.
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Wild chimpanzees consider "who they are talking to" before they call out, according to scientists.
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(PhysOrg.com) -- In the never-ending struggle to understand how the human brain works, all manner of experiments are dreamed up and carried out.
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Chimps, like humans, learn from each other what foods can help cure what ails them.
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Playful behavior is widespread in mammals, and has important developmental consequences. A recent study of young chimpanzees shows that these animals play and develop much the same way as human children.
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Psychologist suggests synthesthesia may underlie creature’s apparent memory feats...
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A study published online on April 12 in the Cell Press journal Current Biology offers some news for parents: even toddlers have a tendency to follow the crowd.
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The human mind is unique in its ability to recall the past, plan for the future, reason abstractly and navigate complex social relationships. But why has the physical evolution of Homo sapiens resulted in such convincing mental superiority? To summarize, human beings have "suites of genes that probably cause their brains to be 'plastic' and thus receptive to change far longer (to the age of about five) than is true for chimps or monkeys (whose brains are plastic for less than a year after birth)."
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Wild chimpanzees monitor the information available to other chimpanzees and inform their ignorant group members of danger.
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Sharing food has widely been considered by scholars as a defining characteristic of human behavior.
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For years, scientists believed the vast phenotypic differences between humans and chimpanzees would be easily explained – the two species must have significantly different genetic makeups. However, when their genomes were later sequenced, researchers were surprised to learn that the DNA sequences of human and chimpanzee genes are nearly identical. What then is responsible for the many morphological and behavioral differences between the two species? Researchers at the Georgia Institute of Technology have now determined that the insertion and deletion of large pieces of DNA near genes are highly variable between humans and chimpanzees and may account for major differences between the two species.
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