G+: Reshared post from Randal L. Schwartz:

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Original Post from Randal L. Schwartz:

10 civilizations that disappeared mysteriously.  interesting read.

10 Civilizations That Disappeared Under Mysterious Circumstances

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Originally posted on Google+. Join the conversation at Reshared post from Randal L. Schwartz:

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https://plus.google.com/118347867796626195694

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