The theory is somewhat out of favor because several key pieces of evidence fail to support the theory. For example, hairlessness, while found in several aquatic mammals, is not indicative of aquatic mammals (see aardvarks and rhinoceros). | The theory is somewhat out of favor because several key pieces of evidence fail to support the theory. For example, hairlessness, while found in several aquatic mammals, is not indicative of aquatic mammals (see aardvarks and rhinoceros). |