For 11,000 years after the insolation anomaly went negative, the Earth cooled down. EPICA ice core. What is interesting about this period of cooling is that it was not a period of constant cooling. There were many times when the Earth even appeared to be warming for more than 1,000 years at a time, but the long-term cooling was hidden in the short-term fluctuations. It was always present, but it was hard to see because it was small in comparison to the short-term fluctuations. There is simply no short-term period in which the cooling could be detected. The only possible way to detect the
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