Number 49 (Story #3), September 26, 1991 by Phillip F. Schewe and Ben Stein THE GREAT ANNIHILATOR , the compact gamma source near the galactic center, may be accreting matter not from a stellar companion but from a molecular cloud observed to be in the vicinity by scientists at AT&T Bell Labs. Marvin Leventhal (201-582-3448) was instrumental in monitoring the gamma source for many years at gamma wavelengths with a balloon-mounted telescope. This time he switched to millimeter wavelengths (using a 7-meter antenna at Bell Labs) to study emissions (mostly from CO molecules) from the galactic center, near the gamma source. (Nature, 19 Sept. 1991.)