In honor of that Greek mathematician dude Archimedes (287-212 BC), who discovered (or mebbe just gave a name to) the Law of Hydrostatics; said discovery made as he stepped into his bath and observed the displacement of water.
You'll have to go elsewhere if you want an explanation of the Law. My mother was the mathematician in the family... not I.
Oh, he also surmised that if he had a lever long enough (and someplace to stand) he could move the Earth.
Peace, everyone, and don't wait til Saturday night to soak in the tub.