The first of April has a small share of notable birthdays for physicians, scientists, and others who impacted the human condition. A name that rings a bell is William Harvey (1578) shown above. This English physician produced the first accurate description of the function of the heart and circulation of the blood in his book, Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus [Painting attributed to Daniel Mytens, 1627. National Portrait Gallery London] Predecessors back to the time of Galen had gotten the physiology wrong, but Harvey was forgiving in his discovery, telling students: “Not to praise or dispraise other anatomists, for all did well, and there was some excuse even for those who are in error.” French mathematician Marie-Sophie Germain (April 1, 1776) produced pioneering work in elasticity theory and Fermat’s Last Theorem. Bismarck (1815) and Rachmaninoff (1873) came along as April firsters in the 19th century. Joseph Murray (April 1, 1919 - November 26, 2012) was a plastic surgeon and close friend of my old professor at UCLA, Willard Goodwin. When I was a resident I naively thought Joe was somewhat out of his league in his yearly travel group of old friends that included Goodwin and Robert McNamara, until Joe got the Nobel Prize for his work with renal transplantation.