Diamond cousin proposed

Researchers predict a new form of carbon

Diamond may have a softer side: T-carbon.

DIAMOND FLUFF Replacing carbon atoms in diamond with pyramids of carbon could produce a new material that is both lightweight and hard. Qing-Bo Yan

This fluffy form of diamond, simulated in a Chinese supercomputer, could be used for a variety of applications — if someone can make the stuff and prove its stability in the real world.