salamanders without eyes? try Kitchens without a brain....anyone knows that if you lift weights as a young person you gain muscle mass and if you stop lifting you lose it. Or, you have admirable calves but have a nerve injury that causes you to lose control of those muscles....they atrophy...it is not evolution....those salamanders chose to swim into dark places....they could not find their way out again but they did not die....they adapted and survived and reproduced. overtime the atrophy of their now unnecessary eyes became a discernable physical characteristic. Hey, it happens all the time with dog breeding....old chris is a prime example...his forefathers were probably smart but he is not.