The drive to make more milk has had an unsavory side effect: Cows have become more genetically similar and less fertile. Scientists are trying to... Most U.S. Dairy Cows Are Descended From Just 2 ...

Authorities in the Cambodian capital have rounded up 15 bulls and cows after their mating habits caused traffic accidents along a busy road, a local councillor said. Officials began herding the ...

Unlike most dairy cows in America, which are descended from just two bulls, this cow at Pennsylvania State University has a different ancestor: She is the daughter of a bull that lived decades ago, ...

Chad Dechow, a geneticist at Pennsylvania State University who studies dairy cows, is explaining how all of America's cows ended up so similar to each other. He brings up a website on his computer.

Unlike most dairy cows in America, which are descended from just two bulls, this cow at Pennsylvania State University has a different ancestor: She is the daughter of a bull that lived decades ago, ...