Of all the present-day artifacts, the spherical artifact is the oldest. Excavated evidence shows that stone balls were made and used in the world at least from 1,000,000 years ago. So far people have discovered various sets of stone and pottery balls at ancient sites in a number of world areas. A series of their samples is selected and their photos and stories are presented in the book. They are full of interest and mystery. Any one of them can be a focus for unconstrained thoughts and imaginings. They are still gaps in modern archaeological science. Because of the lack of worldwide...