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Period: 3300 BCE to 1900 BCE
Decline of Mohenjo Daro and Harappa
Actually, Mohenjo-Daro is one big mystery. Much of what we know (or think we know) about them is speculative, based solely on the artifacts and ruins of Mohenjo-Daro, Harappa, and dozens of other sites found in the Indus River Valley. -
Period: 2100 BCE to 1800 BCE
Aryan Invasion
The Aryan Invasion theory was first propounded when linguistic similarities between Sanskrit and the major European languages were discovered by European scholars during the colonial era.