Number 30 (Story #2), April 18 1991 by Phillip F. Schewe and Ben Stein VENUS DOES NOT HAVE "'MID-OCEAN" RIDGES. The notion that ridges in the Ovda Regio section of Venus were caused by crustal spreading was dispelled by new radar pictures from the Magellan spacecraft. An extensive summary of the Magellan mission so far appears in the 12 April issue of Science.