How Things Spread : TED Radio Hour What makes an idea, a brand, or a behavior catch fire? This hour, TED speakers explore the mysteries behind the many things we spread: laughter and sadness, imagination, viruses and viral ideas.

TED Radio HourTED Radio Hour

Life's biggest questions, explored.

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What makes one idea spread over another?

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How Things Spread

What makes an idea, a brand, or a behavior catch fire? This hour, TED speakers explore the mysteries behind the many things we spread: laughter and sadness, imagination, viruses and viral ideas.

Bill Gates speaking at TED in 2015. Wolfram Scheible/TED hide caption

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Wolfram Scheible/TED

Bill Gates: How Can We Prevent The Next Global Health Epidemic?

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Nicholas Christakis at speaking at TED in 2010. James Duncan Davidson/TED hide caption

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James Duncan Davidson/TED

Nicholas Christakis: How Do Our Social Networks Affect Our Health?

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Historian Yuval Harari speaking at TEDGlobalLondon. James Duncan Davidson/TED hide caption

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James Duncan Davidson/TED

Yuval Harari: Why Did Humans Become The Most Successful Species On Earth?

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TED Radio HourTED Radio Hour

Life's biggest questions, explored.