More than 1.2 million years ago in Ethiopia, an early hominin species made handaxes using only obsidian (a type of volcanic glass that can produce blades sharper than surgical steel) nature.com Submitted by marketrent t3_10mcg0k on January 27, 2023 at 4:49 AM in science 17 comments 312
mroboto2016 t1_j62zku6 wrote on January 27, 2023 at 10:05 AM We have obsidian arrow heads made by ancient Native American tribes here in North Cal. There's a road called bottle rock road nearby, and during road work I saw boulders of it 6 feet across. The stuff is sharp. Permalink 2
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