Scorpio, << SKAWR pee oh, >> is the eighth sign of the zodiac. Its symbol is a scorpion. Astrologers believe that Scorpio is ruled by the planet Mars, which they consider a planet of force and violence. Scorpio is a water sign. Astrologers consider people born under the sign of Scorpio, from October 23 to November 21, to have the characteristics of Mars. Scorpios are aggressive and stimulated by conflict. They tend to change moods quickly, going from calm to anger and from rudeness to politeness. A fascinating personality and outstanding powers of leadership give Scorpios the respect, rather than the affection, of others. Scorpio is also ruled by Pluto, the planet of secrecy. Thus, Scorpios are secretive and like to investigate secrets.