Your Hair Reveals Your Secrets
?Or at least where you’ve been. Researchers have now learnedthat they can track criminals and terrorists by analyzing asingle hair.
Anna Gosline writes in New Scientist that researchersmeasure the ratios of oxygen and hydrogen isotopes in thehair. These isotopes, absorbed into the body from water, aredifferent in different areas. Researcher Stuart Black says,”Hair is particularly good because it grows about [half aninch] a month, so it actually grows a record of not onlywhere you have been but what you have been eating and drinking.”
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