What comes in pairs like forks and knives? Perhaps fish and mad cow disease, scientists have discovered. Robert P. Friedman, neurologist of University of Louisville, and his co-workers believe that fish that are fed cow byproducts, such as cow meat or bone meal, may be transmitters of mad cow disease. Though the doctors have not yet found whether it’s possible for a fish to transmit the disease to humans, they are urging government regulators to ban the feeding of cow byproducts to fish. Seeing as mad cow disease is untreatable and fatal, it’s best for all farmers to take caution. Stay safe by keeping your plate fish-free.