Number 165 (Story #3), February 17, 1994 by Phillip F. Schewe and Ben Stein MYSTERIOUS ATMOSPHERIC RADIO BURSTS have been measured by the ALEXIS satellite, which patrols the sky for evidence of nuclear detonations. The radio bursts are much stronger than those associated with lightning bolts and only seem to occur over Africa and South America. The best explanation given so far is that the radio signals may be linked with equally mysterious light flashes seen above certain thunderstorms. (Science News, 12 Feb.)