A team of archaeologists studying bone artifacts discovered in a cave on the island of Unguja in the Zanzibar archipelago of Tanzania has found evidence to suggest that bone tools were used for hunting, and even as poison arrow tips. Four of the projectile point fragments recovered from Kuumbi Cave: (A, C and G) impact fractures; (B and D) possible retrieval cut marks; (E) rounded tip; (F) post-depositional fracture revealing bone surface; (H) change...
