Ringer Posted August 22, 2010 Share Posted August 22, 2010 http://www.scientificamerican.com/article.cfm?id=tools-for-life Interesting stuff Link to comment Share on other sites More sharing options...
CharonY Posted August 23, 2010 Share Posted August 23, 2010 Has been posted a couple of times here, actually. Link to comment Share on other sites More sharing options...
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