Three American scientists have won the 2017 Nobel Prize in Physiology or Medicine. The three were recognized for their work on the body’s daily rhythms -- the biological processes that our bodies repeat over and over again. These actions affect the way a person feels. The Nobel committee says the scientists’ work has opened up new areas of research and increased understanding about the importance of getting enough sleep. Jeffrey C. Hall, Michael Rosbash and Michael W. Young won the $1.1 million prize for finding genetic processes that control circadian rhythms. Circadian rhythms adapt the workings of the body to different times of the day. They can influence sleep, behavior, body temperature and the natural processes for breaking down food and making energy.