RedOrbit: The 13th century Mongolian conqueror Genghis Khan relied on hordes of Mongol warriors to expand his empire. Now, according to a new study in the Proceedings of the National Academy of Sciences, it has been determined that Genghis was also aided by the favorable effects of climate change.
In the report, a team of American and Mongolian scientists described how they used an analysis of tree rings to show that from 1211 to 1225 Mongolia experienced a period of relatively warmer and wetter weather...