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I'm also sad to see that it looks like your community lost an important member recently. My humble condolences to all of Neil's loved ones.

I'm sorry to be rudely coming back to this a bit late. I got hit with a deadline...I am truly impressed with what you guys have got going on here-not just the wealth of knowledge but the eagerness to...

Hi,

A while back I read that obsidian is the sharpest material there is, so naturally I went ahead and chipped off an obsidian from my boyhood rock collection and shaved with it a little. From...