The metal has a giant air bubble that helps it float Ships float by displacing water; to remain afloat, a ship must weigh less than the volume of water it displaces. When the Titanic's ...

The new metal composite could be used in future shipbuilding as it weighs less that water itself News Jeff Parsons Tech/Science reporter 11:34, 15 May 2015Updated 15:25, 18 May 2015 US researchers ...