Question: Of the two flowering plants Eriogonum and Ascocenda, is one natural and the other man-made?
Sentence (from "1177 B.C.: The Year Civilization Collapsed"): He presents evidence to support a "perfect storm" of "multiple interconnected failures", meaning that more than one natural and man-made cataclysm caused the disintegration and demise of an ancient civilization that incorporated "empires and globalized peoples".
Relevant evidence: No