When changing size, especially on the scale of a battleship compared to a floating object in a bathtub, all sorts of things don't scale the same. For example if an ant was scaled up to human size it would no longer be able to have the same strength to weight ratio it enjoys at its regular size. Another example that seems excessive but is true is that to small flying things, like bees, the air seems much more viscous than it does to us. I was reading several years ago in Science News that the viscosity of water to a swimming human is similar to what small flying insects experience flying in air. I wonder what the world is like for very small life forms, like bacteria, and very large ones like blue whales. Eric