The ability to share knowledge and learn from each other may be the key difference between people and chimpanzees that helped humans to dominate the modern world.
Source: http://www.cosmosmagazine.com/news/5366/is-sharing-key-advanced-society
Halle Berry Hayden Panettiere Haylie Duff Heidi Klum Heidi Montag Hilarie Burton Hilary Duff Hilary Swank
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