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Disuse of organs
Cassowary, a flightless bird (related to the Ostrich) found in Australia and New Guinea. Why did God create birds with nonfunctional wings?
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. . . . I think there can be little doubt that use of our domestic animals strengthens and enlarges certain parts, and disuse diminishes them; and tht such modifications are inherited. Under frenature, we can have no standard of comparison, by which to judge the effects of long-continued by the effects of disuse. . . . . As the larger ground-feeding birds seldom take flight except to escape danger, I believe that the nerly wingless condition of several birds, which now inhabit or have lately inhabited several oceanis islands, tenanted by no beast of prey, has been caused by disuse. The ostrich indeed inhabits continents and is exposed to danger from which it cannot escape by flight, but by kicking it can defend itself from enemies, as well as any of the smaller quadrupeds. . . . Page 150
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