Ivan Petrovich Pavlov was a Russian and Soviet experimental neurologist and physiologist known for his discovery of classical conditioning through his experiments with dogs. Pavlov also conducted significant research on the physiology of digestion, for which he was awarded the Nobel Prize in Physiology or Medicine in 1904. The Nobel Prize in Physiology or Medicine 1904, announced October 20, 1904. Ivan Pavlov, “in recognition of his work on the physiology of digestion, through which knowledge on vital aspects of the subject has been transformed and enlarged”. Ivan Pavlov: born 1849, Ryazan, Russia. Wiki link Data: the Nobel Foundation (CC0).