Those born under the sign of Cancer are generally said to be super-sensitive and to have the capacity to heal others. Scorpios, on the other hand, are often described as manipulative and secretive. Both these signs are a part of the zodiac, an imaginary belt in the heavens divided into 12 equal parts -- each named for a different constellation. An early attempt to devise a calendar based on observation, the zodiac was not originally created for superstitious...