Dr. Tyrone Hayes is a professor of Biology at UC Berkley who has been at the forefront of some groundbreaking research into the developmental effects of the pesticide Atrazine on amphibians and mammals. Dr. Hayes runs the Atrazinelovers homepage, a site dedicated to educating the public about the effects of the pesticide on our environment and human health. His research and outreach have earned him the ire of many in the pesticide industry, especially from Syngenta, the company that manufactures Atrazine. The Oyster’s Garter provides a good introduction to his research here.
Below is a video of one of his talks, summarizing his research: