Event:
Scientists have concluded that a large ocean exists beneath the icy surface of Ganymede, the largest moon of Jupiter; the discovery was made by using the Hubble Space Telescope to observe aurora movements at the moon's poles
More Notable Events on March 13:
1991 Exxon pays $1-billion dollars in fines and cleanup of Valdez oil spill
1974 Charles de Gaulle Airport opens near Paris
1970 Digital Equipment Corp introduces PDP-11 minicomputer
1965 Jeff Beck replaces Eric Clapton of the Yardbirds
1519 Cortez lands in Mexico
