Charles H. Best was a physiologist and medical researcher who co-discovered the use of insulin as a treatment for diabetes.
Francis Crick is responsible for discovering, along with James Watson, the double-helix structure of the DNA strand.
Willem Einthoven was a physiologist who discovered the electrical properties of the heart and developed the EKG.
Bernardo Alberto Houssay was an Argentinian doctor whose research on the role of pituitary hormones regulating blood sugar won him a Nobel Prize.
Roger W. Sperry was a 20th century scientist who won the Nobel Prize for his groundbreaking research on brain hemispheres.