".. the word ecology, coined by the German biologist and philosopher Ernst Haeckel (initially as oecology) in 1866. derives from the Greek oikos, "referring originally to the family household and its daily operations and maintenance." The term ecology is therefore intended to refer to the study of the conditions of existence that pertain to, and the interactions between, all the entities that make up our larger, cosmic household here upon earth."

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It has taken biologists some 230 years to identify and describe three quarters of a million insects; if there are indeed at least thirty million, as Erwin (Terry Erwin, the Smithsonian Institute) estimates, then, working as they have in the past, insect taxonomists have ten thousand years of employment ahead of them. Ghilean Prance, director of the Botanical Gardens in Kew, estimates that a complete list of plants in the Americas would occupy taxonomists for four centuries, again working at historical rates.

— Richard Leakey