Why would a fish that is adapting to a water environment grow legs and walk out on land?
Natural Selection, by definition, would select the legs out of the process because there would be no survival advantage in a water environment.
Presumably there are steps between the two with an intermediate state that mostly tended to make sense at each step. Anyway, there are tons of people looking for the evidence of fossils to back fill this theory.
A more complicated question:
How does one reproductive system evolve into another, as with amphibians to reptiles? Darwin lost not only his cookies but his scientific credentials trying to explain this with the idiotic idea of natural selection.
Great theory. Lets apply some scientific method to it and put a bunch of fish on land with no water and see what nature selects for them.
Dude, you’re just not thinking right.
Millions and millions of years of absolutely pointless and useless intermediate forms that served no purpose and left no evidence.
Now, get back in line!