When his views were condemned by theologians of the Reformation as well as those of the Catholic Church, Servetus, a Spanish theologian, assumed a new name and began studying medicine. He became known for his ability in dissection and had unusual success as a physician, even serving—confidentially—the archbishop of Vienne. Arrested for the publication of a religious work, he escaped but was seized again, tried, and burned at the stake. He was the first European to make what medical discovery? Discuss