Cows are useful for more than just food. They are studied through genetic research to produce offspring with desirable traits like increased milk production or meat quality. They are also used in medical research as a way to test new vaccines and disease treatments. The document discusses how artificial insemination is used to efficiently breed cows with specific traits by selectively choosing bull semen. It also notes cows are important to society by providing food, jobs for ranchers and scientists, and healthier animals through medical research.