The Four Most Dangerous Words? A New Study Shows | Laura Arnold | TEDxPennsylvaniaAvenue

Laura Arnold, co-chair of the Laura and John Arnold Foundation, describes how junk science is harming all of us, personally and as a society, and offers ideas for how philanthropists and policymakers can incorporate rigorous research into efforts to solve pressing problems.

This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at http://ted.com/tedx

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