Around 500 years ago the once flourishing Aztec Empire suddenly collapsed. Who or what killed them? Was it the Spaniards? Or perhaps some terrible epidemic? Scientists believe that the latter of the two might have been the culprit, and it looks like they’ve finally found exactly what brought on this civilization-destroying disease.

Watch this video to find out how it came about and to learn some interesting facts about the Aztecs that you might not have known.

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