You might not often think about the molars of livestock, but everything from the grass they eat to the water they drink can tell a story about how people lived centuries ago. An international collaboration led by University of Michigan researchers examined herd management in medieval Kazakhstan usin g isotopes embedded in the enamel of sheep's molars. They found that people living in the arid region fine-tuned their animal-management strategies to succeed in a challenging environment. ...read more read less