Tools Never Die ? Last Chance To Say 'Yes They Do'

As our search for extinct tools continues, we examine your suggestions, and question: if a tool is modified over the years, is it different enough to be a new species?

Source: http://www.npr.org/blogs/krulwich/2011/02/04/133433140/tools-never-die-last-chance-to-say-yes-they-do?ft=1&f=1007

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