1. What are the problems with the savannah hypothesis of human evolution? 2. Why is it difficult to determine whether or not climate affected human evolution? 3. Why are climatic explanations of the megafaunal extinctions of 12,500 YA suspect?
1. What are the problems with the savannah hypothesis of human evolution?
2. Why is it difficult to determine whether or not climate affected human evolution?
3. Why are climatic explanations of the megafaunal extinctions of 12,500 YA suspect?
4. Why are natural explanations for the CO2 and CH4 increases in recent millennia suspect?
1) How do the processes that control δ18O changes in ice sheets differ from those that control δ18O fluctuations in ocean cores?
2) What other regions show millennial oscillations like those in the North Atlantic and Greenland
3) Are millennial oscillations true cycles?
1) What is the major uncertainty about the total volume of ice at the glacial maximum?
2) In what ways did ice sheets make the glacial world a dirtier place?
3) What does the composition of pollen tell us about climate change?
4) How and why did the glacial climate of the S.W. The United States differs from the climate there today?
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