Michael Servetus was a Spanish theologian, physician, cartographer, and Renaissance humanist. He was the first European to correctly describe the function of pulmonary circulation, as discussed in Christianismi Restitutio (1553). He was a polymath versed in many sciences: mathematics, astronomy and meteorology, geography, human anatomy, medicine and pharmacology, as well as jurisprudence, translation, poetry, and the scholarly study of the Bible in its original languages. September 29, 1511 – November 6, 1553; died at 42. Alive at the same time as Michelangelo, Martin Luther, Niccolò Machiavelli, Vasco da Gama, and Michel de Montaigne. Wiki link