Journal Star: The neighborhood where Tyrone Hayes grew up was developed by draining a swamp. He spent his youth fascinated with frogs, turtles, snakes and lizards that shared his stomping ground. Hayes graduated from Harvard University with a major in evolutionary biology, earned a Ph.D. at 24 and became the youngest tenured professor at the University of California-Berkeley. He became a world expert on frog development. Then he met atrazine, an herbicide used on more than 70 percent of …