Beginning from a temperature peak at 55.5 million years ago,the Earth began a long-term warming trend that has carried us into our current time between Ice Ages.

Question

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The temperature peak 55.5 million years ago, known as the Paleocene-Eocene Thermal Maximum (PETM), marked the start of a long-term cooling trend, not warming, leading to the development of ice ages and the cooler climate we experience today.

Beginning from a Temperature Peak at 55