Evolution of Hate, Aggression, and War

Evolution of Hate, Aggression, and War - Back to the...

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Back to the question of why are there different races? Skin color: variations in melanin pigment Skin Color is correlated with latitude White (north)—>Brown Black (south) Natural selection—specialization for different environments? Few good examples exist:
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Skin Color Correlated with Latitude North North - less sunlight—>less vitamin D Less calcium More rickets. To prevent rickets Lose pigment ! South South - more sunlight sunburn & hypervitamintosis D Keep pigment!
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European skin turned pale recently, Science April 20, 2007 -----long after Homo sapiens arrived in Europe. The mutation in gene SLC24A5 that causes pale skin in Europeans is only 6,000-12,000 yrs old Our ancestors were brown skin for thousands of years in Europe. What happened? Early immigrants were hunters/gatherers and had lots of vitamin D in their diet. Then when farming spread 6,000 yrs ago that changed.
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A Final Problem In 2004 a new species of fossil humans In 2004 a new species of fossil humans was discovered in Indonesia was discovered in Indonesia Homo floresiensis How does this fit into our phylogeny?
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Homo floresiensis Found in a cave on the island of Flores
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Homo floresiensis 3 feet tall
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Dated ~ 18,000 yrs ago . Phylogeny?
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This note was uploaded on 12/09/2009 for the course BIO 200 taught by Professor Herreid during the Spring '07 term at SUNY Buffalo.

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Evolution of Hate, Aggression, and War - Back to the...

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