In the early 1990s, the Chair of Toxicology at the Forsyth Dental Institute, Dr. Phyllis Mullenix, conducted animal research on the neurotoxicity of fluoride. Mullenix, expecting to find no effect, was surprised to observe that fluoride was impacting the behavior of the animals in a manner similar to what she had previously found with leukemia drugs. Based on her findings, Mullenix hypothesized that fluoride was a neurotoxin, and that the doses American children are currently receiving could pose a problem to their behavior/cognitive development. Journalist Christopher Bryson explains what happened to Mullenix after publishing her findings.