A flake of obsidian and a sheep bone found at on a high bluff in northwestern Wyoming’s Shoshone National Forest  suggest that the site may have been used for hunting and butchering sheep in prehistory. Archaeologist Larry Todd points out that people have been living in the area for 13,000 years. “The places that were […]

Silver excavated from Mexican mines by the Spanish  has been detected in English coins dating to the 1550s. Silver from Bolivia was also being mined by Europeans at this time, but it didn’t show up in their coins until later. Geologists Anne-Marie Desaulty and Francis Albarède of the Ecole Normale Supérieure speculate that Mexican silver […]