Richard Alley is the Evan Pugh University Professor of Geosciences at Penn State University in State College, Pennsylvan
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17:07
100 Years Of Your Daily Weather Forecast
How has the field of weather prediction improved over the past 100 years, and what challenges do forecasters still face?
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12:09
Antarctica May Accelerate Global Sea Level Rise
A new study suggests a melting Antarctica could pump up global sea levels much more than previously predicted.