Climate flux matched Europe’s social rise and fall

Agence France-Presse: Ancient tree rings show links between climate change and major events in human history, like migrations, plagues and the rise and fall of empires, said a study this week in the journal Science. Moist, balmy temperatures were seen during prosperous Medieval and Roman times, while droughts and cold snaps coincided with mass migrations. To match the environmental record with the historical one, researchers looked at more than 7,200 tree fossils from the past 2,500 years, said lead author Ulf Buntgen......

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