Number 35 (Story #3), May 22, 1991 by Phillip F. Schewe and Ben Stein SUPERCONDUCTIVITY AT A TEMPERATURE OF 28 K has been observed in carbon-60 doped with rubidium by the same group at AT&T Bell Labs (Arthur F. Hebard, 201-582-4944) that last month discovered superconductivity in C-60 at 18 K. The 28-K transition temperature is the highest for any material except Ba-K-Bi-O and the cuprate superconductors. (Physical Review Letters, 27 May 1991.)