Located in present-day India and Pakistan, the Harappan civilization fell victim to shifting monsoon patterns, a new study has found.?
The mysterious fall of the largest of the world's earliest urban civilizations nearly 4,000 years ago in what is now India, Pakistan, Nepal and Bangladesh now appears to have a key culprit ? ancient climate change, researchers say.
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Ancient Egypt and Mesopotamia may be the best known of the first great urban cultures, but the largest was the Indus or Harappan civilization. This culture once extended over more than 386,000 square miles (1 million square kilometers) across the plains of the Indus River from?the Arabian Sea?to the Ganges, and at its peak may have accounted for 10 percent of the world population. The civilization developed about 5,200 years ago, and slowly disintegrated between 3,900 and 3,000 years ago ? populations largely abandoned cities, migrating toward the east.
"Antiquity knew about Egypt and Mesopotamia, but the Indus civilization, which was bigger than these two, was completely forgotten until the 1920s," said researcher Liviu Giosan, a geologist at Woods Hole Oceanographic Institution in Massachusetts. "There are still many things we don't know about them." [Photos: Life and Death of Ancient Urbanites]
Nearly a century ago, researchers began discovering numerous remains of Harappan settlements along the Indus River and its tributaries, as well as in a vast desert region at the border of India and Pakistan. Evidence was uncovered for sophisticated cities, sea links with Mesopotamia, internal trade routes, arts and crafts, and as-yet undeciphered writing.
"They had cities ordered into grids, with exquisite plumbing, which was not encountered again until the Romans," Giosan told LiveScience. "They seem to have been a more democratic society than Mesopotamia and Egypt ? no large structures were built for important personalitiess like kings or pharaohs."
Like their contemporaries in Egypt and Mesopotamia,?the Harappans, who were named after one of their largest cities, lived next to rivers.
"Until now, speculations abounded about the links between this mysterious ancient culture and its life-giving mighty rivers," Giosan said.
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