Weed Killer Makes Male Frogs Lay Eggs

National Geographic: The so-called pregnant man has company: One of the most common weed killers in the United States can make male frogs lay eggs, a new study says. Atrazine, widely used to kill pests on U.S. croplands, is an endocrine disruptor--a substance that interferes with animals' reproductive systems. Previous research has shown that atrazine can give male amphibians female characteristics: For instance, male frogs exposed to atrazine have lower testosterone levels, produce less sperm, and ......

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