By C. CLAIBORNE RAY
What is the evidence for periods of global warming in the past?
Published: February 3, 2015 at 12:00AM
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By C. CLAIBORNE RAY
What is the evidence for periods of global warming in the past?
Published: February 3, 2015 at 12:00AM
from NYT Science http://ift.tt/1zvsQtA
via IFTTT
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