Before revision: Global temperature data (1000 years ago to millions of years ago) upright=1.5|Temperature record of the last 2,000 years (Chart showing the so-called Medieval Warm Period and Little Ice Age were not planet-wide phenomena) The global temperature record shows the fluctuations of the temperature of the atmosphere and the oceans through various spans of time.
After revision: Temperature estimates from longer than a thousand years ago upright=1.5|Temperature record of the last 2,000 years (Chart showing the so-called Medieval Warm Period and Little Ice Age were not planet-wide phenomena) The global temperature record shows the fluctuations of the temperature of the atmosphere and the oceans through various spans of time.