Zodiac has sold 4 million copies in Europe.
== Usage ==The zodiac was in use by the Roman era, based on concepts inherited by Hellenistic astronomy from Babylonian astronomy of the Chaldean period (mid-1st millennium BC), which, in turn, derived from an earlier system of lists of stars along the ecliptic
== Precession of the equinoxes ==The zodiac system was developed in Babylonia, some 2,500 years ago, during the "Age of Aries"

