When one thinks of sand art, sand castles are what often comes to mind, but Tibetan Buddhist monks have long designed magnificent mandalas out of colored sand, for which Iranian artists have put a new spin tofamous for their traditional Persian rugs, a group of artists have taken it to a whole new level by creating the worlds largest sand carpet.Photo Abolfath Davari / ISNA The unique 39,400 square foot (12,000 sq. meter) world record carpet was created by 25 visual artists made entirely of 70 t