Another Form of Carbon: Magnetic Nanofoam

mhh5 writes "Researchers publishing in Nature have discovered yet another form of carbon. Apparently, this stuff is temporarily magnetic after it is made (at temperatures of ~10,000 C) and is a spongy solid. So that's five (give or take one?) allotropes for carbon: amorphous, graphite, diamond, fullerenes, and nanofoam. Collect them all!"