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Perseus eventually discovers Medusa with her sisters, the Gorgons. Unlike her they are all immortal. Using Athena's mirror to defend himself, Perseus beheads Medusa, at which point the winged horse Pegasus and the warrior Chrysaor spring from her decapitated body. When the Gorgons attempt to punish Perseus for killing their sister, he evades them by using the helmet given to him by the sea nymphs, thus becoming invisible.

June 1993