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Year-long probe explores child labor used to mine valuable mineral in Africa
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NBC News NOW
How humans evolved to react to moral outrage
03:53
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How do you go viral? Simple, add a little outrage. Expressing moral outrage over injustice and unfairness was part of our evolution — it’s part of how we keep order in society. Today, it’s part of how we go viral. Two neuroscientists reveal the science behind this ancient social emotion that fuels so much of our online discourse today.Sept. 4, 2019
