Hw 8 - Will Boas Homework 8 1 The two earlier hypotheses that postulated strong effects of climate change on human evolution are the Turnover Pulse

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Will Boas Homework 8 1. The two earlier hypotheses that postulated strong effects of climate change on human evolution are the Turnover Pulse Hypothesis and the Variability Selection Hypothesis. The Turnover Pulse Hypothesis theorizes that a major change in climate, from woodland to savannah, was a leading factor to species evolving. The Variability Selection Hypothesis credits dramatic and frequent changes in the climate that drove adaptations to deal with a constantly changing environment. 2. Roughly two million years ago, Walker Circulation, circulation occurring from strong east-west atmospheric winds, intensified which allowed for El Nino-Southern Oscillation, which has a strong impact on climate in East Africa. Extreme climate change can also be caused by global forcing, the wobble of the Earth on its axis of rotation as it orbits around the sun. These events caused rapid climate change, which caused humans to stand on two feet. 3.
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This note was uploaded on 10/03/2011 for the course GLG F108 taught by Professor Dilek during the Fall '10 term at Miami University.

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Hw 8 - Will Boas Homework 8 1 The two earlier hypotheses that postulated strong effects of climate change on human evolution are the Turnover Pulse

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