SMALL doses of pesticide are enough to hit frogs where it hurts them most鈥攊n the immune system. This might explain the mysterious disappearance of amphibians all around the globe.
Researchers have been puzzling over this problem for years. The usual suspects are climate change, pollution or disease.
Pesticides are believed to break down under UV light to form poisons that trigger deformities in amphibians (快猫短视频, 13 September 1997, p 18), and weedkillers can turn male frogs into females. But Brian Dixon of the University of Waterloo in Ontario, Canada, believes he has discovered the real reason why…
