8. Past EARTH temperatures Graph based on data from the Climatic Research Unit of the University of East Anglia.
9. Past EARTH temperatures Graph based on data reported by Moberg, et.al., in Nature, V. 433, 10 February 2005.
10. Past EARTH temperatures Global temperature variation for the past 425,000 years. The present is at the right. The horizontal 0 line represents the 1961– 1 990 average global temperature. The numbers on the left show the variation from that baseline in °C. Image based on data from the National Oceanographic and Atmospheric Administration.