Looking at nitrogen isotopes, researchers are claiming that manure was started being used as agriculture spread to Europe from the Near East. The earliest use of manure is being dated to around 8000 years ago, which is thousands of years earlier than had been previously thought.
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The consumption of nicotine was more widespread than previously thought among ancient Chilean societies. Analyzing hair collected from mummies discovered in Chile's Atacama Desert, researchers were surprised to discover that people as early as 100 B.C. were smoking tobacco, and that it was not restricted to certain social or economic classes.
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