N atural carbon can exist in several forms. They are only new to us .
Fullerenes are large carbon-cage molecules.
But fullerenes are still small compared to many organic molecules. This property is used in growing crystals and thin films of fullerenes. In practical terms, they may have a number of applications. In pure scientific terms, fullerenes are fascinating because they show unusual properties for carbon materials. There are other organic superconductors, but they are different from A 3 C 60 .