Yeah, I don't understand why anyone would nuke beach sand when coffee can carbon foam furnaces are trivial to make. And in about 2 seconds, I can get a really

Yeah, I don't understand why anyone would nuke beach sand when coffee can carbon foam furnaces are trivial to make. And in about 2 seconds, I can get a really damn sharp "knife" by dropping a wine glass on the floor to induce conchoidal chipping. My foot and hand can attest to them being as sharp or sharper than any surgical instrument or Japanese-angle ground knife.