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Tale from teeth -- University of Florida

http://news.ufl.edu/archive/2015/04/tales-teeth-can-tell-dental-enamel-reveals-surprising-migration-patterns-in-ancient-indus-civilizations.html

Tales teeth can tell: Dental enamel reveals surprising migration patterns in ancient Indus civilizations
Published: April 29 2015
Category:Research
University of Florida researchers have discovered that ancient peoples in the Indus Valley apparently did not stay put, as was previously thought. Equally surprising is how they found out: by examining 4,000-year-old teeth.

When tooth enamel forms, it incorporates elements from the local environment — the food one eats, the water one drinks, the dust one breathes. When the researchers looked at remains from the ancient city of Harappa, located in what is known today as the Punjab Province of Pakistan, individuals’ early molars told a very different story than their later ones, meaning they hadn’t been born in the city where they were found.

Much of what modern researchers have gleaned about our common ancestor
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