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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Science News
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Scoop.it!
(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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