Dental calculus, the hard deposit the dentist scrapes off your teeth, is the only part of your body that fossilizes during your lifetime.
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Dental calculus captures the microbes and food particles in your mouth and provides a record of diet and dental health. Ancient calculus is a time capsule that reveals how human health and diet have changed over time.
Christina Warinner at the University of Oklahoma -- http://cas.ou.edu/christina-warinner
Christina Warinner's blog -- http://christinawarinner.com/
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