Ship
From sciforums_encyclopedia
Big floaty things used to travel across bodies of water without getting wet. Boffins tell us that these BIG, GIANT METAL THINGS can float because of Archimedes' buoyancy principle, ie the volume of fluid that they displace gives an upthrust equal to the weight of the ship.
And, of course, it's utter rubbish. Everyone knows that the dolphins do it.