Taijitu seen in Tripilja culture in Ukraine, displayed in the Ukraine pavilion at the Expo 2010 in Shanghai, China. Also, the interlocking design is found in artifacts of the European Iron Age. While this design appears to become a standard ornamental motif in Iron-Age Celtic culture by the 3rd century BC, found on a wide variety of artifacts, it is not clear what symbolic value was attached to it. Unlike the Chinese symbol, the Celtic yin-yang lack the element of mutual penetration, and the two halves are not always portrayed in different colors. Comparable designs are also found in Etruscan art.
Yin and Yang (Fish albums) which was also released as a lead single. All new tracks were mixed and produced by James Cassidy, who had previously worked on "Songs from the Mirror" and Suits. The outside cover, a relatively simple concept based on the yin and yang symbol (with each element in the shape of a fish) surrounded by a circular Celtic knot pattern, was again designed by permanent Fish collaborator Mark Wilkinson. The "Yin" version of the cover has a black symbol on a white/greyish background, the "Yang" version has a white symbol against a dark-red/black background. (On the Radio Edits CD cover, the