English Poet Samuel Taylor Coleridge attributed his classic poem "Kubla Khan" to a dream. He said he fell asleep while reading about the Mongol conqueror, and woke with a fully developed poem in mind. Novelist Robert Louis Stevenson credited the inspiration for his story of Dr. Jekyll and Mr. Hyde to a dream. Physiologist Otto Loewi attributed his experiment with a frog’s nerves to a dream. The experiment led to a better understanding of the chemical transmission of nerve impulses, and to the Nobel Prize in Medicine in 1936 for Loewi. "German chemist August Kekule, while struggling to find the structure of the benzene molecule, dreamed of a snake biting its tail and, on waking, realized that benzene has the form of a ring."
Reference: The Encyclopedia Britannica, Volume 27, 2002, "Sleep and Dreams," p. 309 and The Encyclopedia Britannica, Volume 4, 2002, "Dream," p. 217