Tyrone Hayes

"Science is a principle and a process of seeking truth. Truth cannot be purchased, and thus, truth cannot be altered by money."

"Professorship is not a career, but rather a life's pursuit. The people with whom I work daily exemplify and remind me of this promise."

Endocrine disruption, environmental justice, and the ivory tower | Tyrone Hayes | TEDxBerkeley

Dr. Tyrone Hayes discusses his journey as a scientist: initially just a “young boy who really liked frogs,” he would go on to earn worldwide fame for his work on the harmful effects of the pesticide atrazine. Arguing that “those who have the privilege to know, have the duty to act,” Dr. Hayes details his decade-long feud with Syngenta, the manufacturer of atrazine, as well as his acute observation that those who suffer most from the environmental impacts of harmful chemicals tend to be the socioeconomically-disadvantaged and racial or ethnic minorities.
At the University of California, Berkeley, and in ponds around the world, professor Tyrone Hayes studies frogs and other amphibians. He's become an active critic of the farm chemical atrazine, which he's found to interfere with the development of amphibians' endocrine systems. This talk was given at a TEDx event using the TED conference format but independently organized by a local community.

Distinguished Scientist Lecture: Tyrone Hayes

Trinity University's Distinguished Scientists Lecture Series presents Tyrone B. Hayes, professor in the Department of Integrative Biology at the University of California, Berkeley, to give a talk titled "From Silent Spring to Silent Night: A Tale of Toads and Men."

The herbicide, atrazine is a potent endocrine disrupter that chemically castrates and feminizes exposed male amphibians, leads to retarded growth and development, and causes immune suppression that results in increased disease rates and mortality. Pesticides (such as atrazine) likely play an important role in amphibian declines. Pesticides like atrazine are ubiquitous, persistent contaminants and the negative effects occur in all vertebrate classes. These observations demonstrate the critical impact that pesticides have on environmental health. Furthermore, reproductive cancers and birth defects associated with exposure to many of these same chemicals (e.g. atrazine) also demonstrate a negative impact on human health. Ethnic minorities and lower socio-economic communities are especially at risk. There is a strong need to provide public access to this knowledge.

Tyrone B. Hayes is an American biologist and professor of Integrative Biology at University of California, Berkeley, known for his research findings concluding that the herbicide atrazine is an endocrine disruptor that demasculinizes and feminizes male frogs. He is also an advocate for critical review and regulation of pesticides and other chemicals that may cause adverse health effects. He has presented hundreds of papers, talks, and seminars on his conclusions that environmental chemical contaminants have played a role in global amphibian declines and in the health disparities that occur in minority and low income populations. His work has been contested by Syngenta, the Swiss manufacturer of atrazine and the Australian Pesticides and Veterinary Medicines Authority. It was used as the basis for the settlement of a multimillion-dollar class-action lawsuit against Syngenta.

The Distinguished Scientists Lecture Series is made possible by the Walter F. Brown Family of San Antonio.

Crown Lecture in Ethics I When Scientific Integrity and Corporate Interests Clash

Tyrone Hayes, professor of Integrative Biology at UC Berkeley, is known for his research findings regarding the effects of the herbicide atrazine, an endocrine disruptor, on the demasculinization of frogs. Syngenta, the Swiss manufacturer of atrazine, launched a campaign to discredit both him and his research, which resulted in the settlement of a multi million-dollar class-action lawsuit against Syngenta. Hayes has presented hundreds of papers, talks, and seminars worldwide on his conclusions that environmental chemical contaminants have played a role in global amphibian declines and contribute to minority and low income population health disparities.

The Crown Lecture in Ethics is made possible by a gift to Duke University from Lester Crown and family and focuses on ethical issues in science, medicine, public policy, business, art, and other fields.

My Interview with "Gay Frogs" Scientist Tyrone Hayes