Well it makes sense that even as nature will optimize her apex predators for maximum performance, that she continues to toss in the odd X-factor. Sometimes, the X-factor is a quantum leap in the animal's design and that evolutionary line will go far (like sharks and rays, which gave up their bony skeletons for the mobility and speed of cartilage). But sometimes, nature takes a good idea too far, and what might have been advantage in an individual of the species, must nevertheless be "taken down" by other natural forces operating on the web of life at a higher level --
