>> Andrew Singer <email@example.com> writes: >> ... >> > "..the mathematician D.S. Ulam argued that it was highly >> >improbable that the eye could have evolved by the accumulation of small >> >mutations, because the number of mutations would have to be so large and >> >the time available was not nearly long enough for them to appear..."
Sure it's improbable for an eye to pop up suddenly out of nowhere, but it becomes a lot more likely if it serves a survival purpose for the owner. And eyes didn't just pop up in the heads of the offspring of a previously blind species - they would most likely have started with the occurence of some simple light-sensitive cells on the body, which would probably be useful to a species. They could then develop from there by natural selection.