Sometimes you make just one tiny mistake and you're finished - you pay for it forever. Our friends the whales made that mistake at the very beginning of things. Instead of electing to come up on dry land, they decided to stay in the sea. Therefore, instead of developing arms and legs, they stayed with fins and a tail, and so they remain to this day prisoners of the ocean. These days you need all the friends you can get - especially if you're a poor, dumb animal. Come to think of it, the same holds true even if you're a rich, smart animal...