Answer
Born in Breslau, now Wrocław in Poland, Otto Loewi conducted groundbreaking research on chemical neurotransmission. His seminal discovery, achieved while collaborating with Henry Dale, unveiled the role of acetylcholine as a chemical messenger at the neuromuscular junction. This milestone contribution revolutionized our understanding of intercellular communication and earned Loewi the Nobel Prize in Physiology or Medicine in 1936.