An analysis of obsidian artifacts excavated during the 1960s at two prominent archaeological sites in southwestern Iran suggests that the networks Neolithic people formed in the region as they ...

A greenish obsidian blade, believed to have been found on the Texas Panhandle, may be from the 16th-century expedition led by the Spanish explorer Francisco Vázquez de Coronado, a new study suggests.

An obsidian blade found at least 80 years ago turned out to be a nearly 500-year-old artifact left by explorers in the Texas Panhandle, a new study said. Photo from Southern Methodist University ...