Weegy: According to the Asia Society, although the Indus Valley civilization was "twice as extensive as its contemporary civilizations - the Old Kingdom of Egypt and the Sumerian city-states of Ur and Lagash," few Americans have heard of it. [ The area of the Indus Valley, which covers modern Pakistan and parts of India and Afghanistan, reached its peak from 2600 - 1900 B.C., a period called Mature Harappan. Early excavations focused on the large cities of Mohenjo Daro - with or without a hyphen (or Mohanjo-Daro 'Mound of Mohan' or Moenjo-daro 'Mound of the Dead') - along the Indus, and Harappa, on the Ravi River. Later excavations looked at smaller villages.
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