The Antilles were first settled by small, nomadic groups, perhaps bands of 30 to 100 people, who, arrive approximately 6000 years ago. They lived by hunting, gathering and fishing. Pottery and agriculture were unknown to them. The tools used by these first groups that extended throughout the Antilles were artifacts made of polished stone, mortars, pestles, coral graters, hammers and nutcrackers, among others. These groups arrived on the island from different places on the continent. These stones balls were found in cemeteries like grave goods.