Baby teeth hold clues to the harms of toxic metals for infants — and older kids

Baby teeth have a value that goes beyond money from the tooth fairy. Scientists say they also hold the key to figuring out what metals in the environment infants were exposed to — and how they affect not just developing baby brains, but behavior in adolescents. "It seems like an impossible question to answer," says Dr. Manish Arora , a professor of environmental medicine at the Icahn School of Medicine at Mount Sinai. …