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Slide 1
World map showing difference in surface temperature 18,000 years ago from today

Difference in sea surface temperature 18,000 years ago from today

Credit: National Air and Space Administration (NASA) (Public Domain)

Graph of changes in sea level as result of waxing and waning of the ice sheets

Changes in sea level as a result of the waxing and waning of the ice sheets

Credit: The Geology of the Virginia Coast by David E. Krantz at University of Toledo, Department of Environmental Sciences. Used with permission.