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Earth used to be cooler than we thought, which changes our math on global warming

Earth used to be cooler than we thought, which changes our math on global warming Philip Kiefer © Provided by Popular Science Earth was cooler than we thought 6,000 years ago. The last 12,000 years have been much cooler than previously thought, according to research published Wednesday in the journal Nature. And in contrast, human-caused warming of the atmosphere is even more anomalous than we’d realized. That’s because the study’s authors have found a new way to estimate historical temperatures which they say filters out seasonal shifts that had made past millennia seem warmer than they really were. © Gerd Altmann/Pixabay

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