Iridium - World's heaviest Metal

What is the world's heaviest metal?

     The heaviest metal in the world is iridium. It was discovered in 1804 by Smithson Tennant of the United Kingdom. Iridium, which is a silvery-white of the platinum group, weighs 1,414 pounds a cubic foot or roughly two-thirds of a ton. Lithium, the lightest metal, weighs 33 pounds per cubic foot.

     If you could stand an elephant weighing nearly six tons at one end of a seesaw, you would need only a two-foot cube of iridium at the other end to lift the animal. Such a cube would cost nearly £15,000,000.