Interesting write up about dolphins I found online.

Humans cherish and admire beings who possess noble traits. The resourcefulness, confidence and grace of dolphins endear them to our hearts and minds. It is because we search for the same characteristics in ourselves that we cherish these magnificent animals.
We like to think that dolphins enjoy being around us as much as we do them. Is it possible that dolphins share our company simply for diversity? Some species can become bored with their own kind. Who gets more out of the relationship: the human or dolphin? They provide us with insight into the realms of anatomy, behavior and communication. Still, our curiosity pushes us to learn more. Although we admire other animals, dolphins remain high on our list of species that fascinate us.
Scientists believe that marine mammals are descendants of animals that once lived on land. The skeleton of a dolphin supports this theory. There is a modified form of hands in the front flippers of a dolphin. Two small, unattached bones located behind the rib cage are believed to be remains of the pelvic girdle, to which hind limbs once attached. Most people wouldn’t know it, but dolphins have a common ancestor with hoofed animals, specifically cows. With so many cow lovers out there as well, it wouldn’t be a surprise.