As a youngster, I read an Aesop's Fable... about a bird who wanted the water at the bottom of a bottle, but could not reach it with its beak. I guess turning the bottle on it's side was not an option as, I imagine, breaking the bottle was not. Despite the personification, the bird was still unable to lift the bottle with its wings... too heavy, perhaps. Well, the bird came up with the solution to add pebbles to the bottle, thereby displacing the water, forcing the reachable level of the water... read more
