Tyrone B. Hayes is an American biologist and professor of integrative biology at the University of California, Berkeley. He is known for his research in frogs, concluding that the herbicide atrazine is an endocrine disruptor that demasculinizes male frogs, causing them to display female characteristics, through a process known as feminization. Hayes is an advocate for the critical review and regulation of pesticides as well as other chemicals that may cause adverse health effects. He has presented hundreds of papers, discussions, and seminars on his research's conclusion that environmental contaminants have played a major role in the global amphibian decline as well as being linked to the many health disparities that occur in minority and low income populations.
Hayes' research into atrazine as an endocrine disruptor has been contested by Syngenta – the company who manufactures atrazine – and the Australian Pesticides and Veterinary Medicines Authority.
In 2023, he was elected to the National Academy of Sciences. Wikipedia
Silencing the Scientist: Tyrone Hayes on Being Targeted by Herbicide Firm Syngenta https://www.democracynow.org/2014/2/21/silencing_the_scientist_tyrone_hayes_on (February 21, 2014)
The toxic baby https://www.ted.com/talks/tyrone_hayes_penelope_jagessar_chaffer_the_toxic_baby (December 2010)
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