Climate change caused empire’s fall, tree rings reveal

(Phys.org) —A handful of tree ring samples stored in an old cigar box have shed unexpected light on the ancient world, thanks to research by archaeologist Sturt Manning and collaborators at Cornell, Arizona, Chicago, Oxford and Vienna, forthcoming in the June issue of the Journal of Archaeological Science.

from Phys.org – spotlight science and technology news stories http://ift.tt/1jx9V60
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