(1603) Italian physician, philosopher, and botanist Andrea Cesalpino passes away. Along with classifying plants, he is known for theorizing the circulation of blood in the body.
(1883) German-Swiss psychiatrist and philosopher Karl Jaspers is born. He studied a number patients with mental health issues including delusions and hallucinations.
(1924) South African American physicist Allan MacLeod Cormack is born. He shared the 1979 Nobel Prize in Physiology or Medicine for his work on x-ray CT scanning.