- The mysterious fall of the largest of the world's earliest urban civilizations nearly 4,000 years ago now appears to have a key culprit — ancient climate change, researchers say. http://www.livescience.com/20614-collapse-mythical-river-civilization.html 123 comments science
- Collapse of Indus Valley Civilization explained | LiveScience http://www.livescience.com/20614-collapse-mythical-river-civilization.html 21 comments india
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