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ajuc
on June 27, 2017
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The Presence of One’s Own Smartphone Reduces Avail...
They had climate change, and it was one of the main reasons "barbarians" migrated, and Rome had fallen.
https://en.wikipedia.org/wiki/Climate_of_Ancient_Rome#Enviro...
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https://en.wikipedia.org/wiki/Climate_of_Ancient_Rome#Enviro...