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Charles Robert Darwin was an English naturalist, geologist and botanist, best known for his contributions to the science of evolution. Darwin published his theory of evolution with compelling evidence in his 1859 book On the Origin of Species. His five-year voyage on HMS Beagle established him as an eminent geologist whose observations and theories supported Charles Lyell's conception of gradual geological change, and the publication of his journal of the voyage made him famous as a popular author. In 1871 he examined human evolution and sexual selection in The Descent of Man, and Selection in Relation to Sex, followed by The Expression of the Emotions in Man and Animals (1872). His research on plants was published in a series of books, and in his final book, The Formation of Vegetable Mould, through the Actions of Worms (1881), he examined earthworms and their effect on soil

Friedrich Hermann Otto Finsch was a German ethnographer, naturalist and colonial explorer. He is known for a two-volume monograph on the parrots of the world which earned him a doctorate. He also wrote on the people of New Guinea and was involved in plans for German colonisation in Southeast Asia. Several species of bird (such as Oenanthe finschii, Alophoixus finschii, Psittacula finschii) are named after him as also the town of Finschhafen in Morobe Province, Papua New Guinea and a crater on the moon