tyrone hayes was hired in 1997 that later became agro business giant syngenta.hey asked him to study their chemical pesticide atrazine. that thefound results manufacturer did not exist -- expect, that it causes sexual abnormalities in frogs and could do the same for humans, syngenta refused to allow him to publish his work. this was the start of a few between the scientists and corporation. new article uses core documents from a class action lawsuit to show how it sought to prevent the epa from banning the chemical, which is already banned by the european union. to start with, the company's public relations team drafted a list of goals. --orter rachel aviv writes for more, we are joined by th himself, tyrone hayes is with us, professor of integrative biology at the university of california berkeley, joining us from the campy tv station. welcome to democracy now. tell us what happened to you, how we -- you were originally tied to syngenta and what prevented you from publishing your findings. a newe at berkeley i was assistant professor, studying the effects of ho