Unintended consequences Edward Tenner on TED.com

Every new invention changes the world — in ways both intentional and unexpected. Historian Edward Tenner tells stories that illustrate the under-appreciated gap between our ability to innovate and our ability to foresee the consequences.¬†(Recorded at TED 2011, March 2011, in Long Beach, California.¬†Duration: 16:10.)

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Source: blog.ted.com