| http://www.w3.org/ns/prov#value | - A big step forward came in 1992 when two scientists reconstructed reconstructed climate data not only for the Last Glacial Maximum, with its lower temperature and CO2 levels, but also for the mid-Cretaceous Maximum (an era when, according to ingenious analysis of fossil leaves, shells, and other evidence, CO2 levels had been much higher than at present and dinosaurs had basked in unusual warmth).
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