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I'm not sure we have records that are precise enough to tell at that scale.

• rhcom2 8y ago
  Scientists use ice cores to recreate temperatures
  • eloff 8y ago
    And we don't have ice cores going back that far.
    • rhcom2 8y ago
      "The oldest continuous ice core records to date extend 123,000 years in Greenland and 800,000 years in Antarctica." https://www.bas.ac.uk/data/our-data/publication/ice-cores-and-climate-change/ https://www.bas.ac.uk/data/our-data/publication/ice-cores-an... It's not a scale of millions of years but that's pretty good.
      • eloff 8y ago
        It is good, but that's relative. A million years is so recent in geological history. It's like a quarter of 1% of the story.
        • DuskStar 8y ago
          Wouldn't it be a quarter of a tenth of 1%?
          • eloff 8y ago
            Indeed it is!