food production

Richard Sexton on the Campbell Conversations

Grant Reeher

Richard Sexton talks about his new book, "Food Fight: Misguided Policies, Supply Challenges, and the Impending Struggle to Feed a Hungry World".

Richard Sexton on the Campbell Conversations

Grant Reeher

Richard Sexton talks about his new book, "Food Fight: Misguided Policies, Supply Challenges, and the Impending Struggle to Feed a Hungry World".

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, called University of Minnesota Cuthbert. The bull's frozen semen was preserved by the U.S. Agriculture Department.

Agriculture

Most U.S. Dairy Cows Are Descended From Just 2 Bulls. That's Not Good

Dan Charles

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 recover valuable genetic variation that was lost.