The various forms of carbon (diamond, graphite, buckyball, and the mighty nanotube) now welcome a new sibling: nanofoam. According to PhysicsWeb:
Physicists in Greece, Australia and Russia have made a new form of carbon that has the lowest density ever reported for a solid - just 2 milligrams per cubic centimetre. The material is a nano-foam of carbon clusters and is the first form of pure carbon to display ferromagnetism, albeit temporary, at room temperature.
Welcome to the family!








