It was the Greek God Athena who cursed Medusa. She used to be a priestess in Athena's temple Unfortunately, her ravishing beauty has caught the attention of Poseidon, the god of the Sea. This would not have been a problem had they not lain together in Athena's temple. For desecrating her temple, Athena turned Medusa's luxurious hair into snakes and made her face so ugly that a mere look at it could turn the other party to stone. For more information about Medusa, visit http://www.ask.com/wiki/Medusa?qsrc=3044.