During his famed voyage on the HMS Beagle, Charles Darwin noted about the Galápagos Islands that “by far the most remarkable feature in the natural history of this archipelago…is that the different islands to a considerable extent are inhabited by a different set of beings…I never dreamed that islands, about 50 or 60 miles apart, and most of them in sight of each other, formed of precisely the same rocks, placed under a quite similar climate, rising to a nearly equal height, would have been differently...