How did ancient humans make stone tools such as arrowheads?

Donald Safford, an expert in the ancient art of flint knapping, will give four presentations this weekend at the Big Hole National Battlefield. He will show how to shape flint, chert, obsidian or other fracturing stone into such things as arrowheads, spearheads and knives.

Some studies assert that an obsidian blade is the sharpest in existence, with a cutting edge that is five hundred times sharper than the best steel scalpel.

Safford's presentations will be at 12 noon and 3 p.m. both Saturday and Sunday, August 1 and 2, at the Big Hole National Battlefield Visitor Center. It's free to the public.

By the way, the 138th commemoration of the Big Hole battle will be next weekend, August 8, with Nez Perce veterans and tribal elders starting the ceremony at 10 a.m. near the Nez Perce Camp. No photos allowed. The battle was fought August 9-10, 1877.