It's several times sharper than surgical steel and has an iridescent beauty that masks its use as a deadly tool. It's obsidian — a hard, dark volcanic glass used for thousands of years by American ...

Sycamore Shoals State Park in Elizabethton is playing host to a class to learn about a pre-historic skill On Saturday, a group hosted what's known as a "knap-in". Knapping is the practice of building ...