Tag: last glacial maximum
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Climate Comeback: How Earth Exited the Last Ice Age
Introduction: A World Cooling and Then Awakening Around 20,000 years ago, Earth faced a dramatic chill. Global temperatures were about 10 degrees Fahrenheit cooler than today, and much of North America wore a thick blanket of ice. Some regions saw ice nearly half a mile high, creating a landscape of plains, fjords, and channels carved…
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How Earth Emerged from the Last Ice Age
Introduction: A World Locked in Ice About 20,000 years ago, much of North America and large swaths of the planet were buried under ice. Global temperatures sat roughly 10°F cooler than today, and in some regions ice sheets reached nearly half a mile in thickness. The Earth’s climate was a stark reminder of how sensitive…