I disagree Danny, and I state again, humans are evolving, as all the other living beings. Atrophy is an adaptation (the bigger primates lost their tails because they started to live in the ground, so the strong tail feature was not decisive and necessary). Other example: once strengthness was not needed anymore, since humans developed tools, that feature was not decisive and necessary, so the weaker humans could survive and spread their genes to their descendents. throughtout the ages, strong and weak humans survived, and the STRONG feautre was dissolved in an average weak species.
Once aquatic animals developed a way to absorve oxigen from the air, they could get out of water and undevelop their aquatic organs, because they were not necessary. Since natural selection stops to act on a particular feature, it tends to dissolve among the countinuous and random mutations through the ages.
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