The Rise Of Empires As Seen By Trees

In ancient times, when things went wrong in battle or the economy, people blamed leaders (if they didn't like them) or the Gods (if they liked the leaders) but maybe they should have blamed global warming.   Errr, and cooling. A new study in Science uses the same techniques as dendrochronology to map the rise and fall of empires and cultures as it was recorded in tree rings - and then to weather conditions. read more

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