Years ago, bison, Native Americans, and European settlers wore trails into the prairie grasses. By the 1880's many trails had become steel rails. Some trails became dirt roads, traveled by wagons, sleighs, and horse-drawn coaches, moving people and . . . — — Map (db m179008) HM
Minnesota's doctors and the institutions they built have played a distinguished role in the medical revolution of the past 150 years. Both the Mayo Clinic and the University of Minnesota Medical School have pioneered treatment techniques that have . . . — — Map (db m178478) HM
