those flakes are sharper than today's scalpels too... iirc a scalpel edge is ~12 to 16 microns and the flake edges are ~4 to 6 micronsOOA and Fire ping.
So we’ve finally moved beyond Douglas Adam’s exhortation to “keep banging the rocks together!”
What, no mention of “the obelisk”?
Is this an article about the Fox News Babes? Oh...my bad.
Old news. Heat treating makes for sharper, easier to flake, and usually more colorful tools but it also makes the material brittle, so it is not suitable for all tools.
those flakes are sharper than today's scalpels too... iirc a scalpel edge is ~12 to 16 microns and the flake edges are ~4 to 6 microns|
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Thanks BGHater for the ping and thanks decimon for the topic. :') |
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Whoops! I take a couple of days off, and I have to be retrained!
Thanks BGHater for the topic as well as the ping. I had this one open in the adjacent tab, and got confused. Time for a vitamin water...
Evidence for Use of Fire Found at Peking Man Site
CRIENGLISH.com | Aug 11, 2009 | Unknown
Posted on 08/12/2009 12:16:08 PM PDT by decimon
http://www.freerepublic.com/focus/chat/2314389/posts
Why are scientists routinely surprised when they discover that people who only had rocks, dirt, wood, plants, fungi, grasses and animal by-products found ways to use them that we, who don’t rely on these things, can imagine.
Sometimes rocks crack in fire - and it could have been noticed they produced sharp corners.