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1 .This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?
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2 .I'm guessing you brush twice a day or aspire to.
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3 .Our ancestors were a little less diligent.
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4 .But that's a good thing for scientists.
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5 .Because ancient, plaque-coated teeth are like time capsules, preserving early evidence of cavities or even plague DNA.
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6 .Now researchers have turned to thousand-year-old teeth from a convent cemetery outside Frankfurt, Germany.
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7 .And they cleaned 'em, much like your dentist does.
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8 ."We used the same dental tools, and collected the calculus from the teeth."
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9 .That's molecular anthropologist Christina Warinner of the University of Oklahoma.
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10 .Inside that calculus or plaque, she and her colleagues found tiny bits of pork, bread wheat and cabbage, identified by their DNA.
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11 .Along with the bugs behind strep throat, bacterial meningitis and an oral strain of gonorrhea.
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12 .And don't be too quick to judge.
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13 ."Nearly all of us still have gonorrhea in our mouth."
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14 .Their study is in the journal Nature Genetics.
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15 .Some of those bugs were antibiotic resistant too.
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16 .Because long before penicillin, some microbes produced natural antibiotics to attack rivals.
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17 ."Your mouth is like a battlefield of bacteria."
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18 .So chew on that.
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19 .Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.
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