The hidden ways stairs shape your life | Small Thing Big Idea, a TED series

Stairs don't just get you from point A to point B. Architect David Rockwell explains how they shape your movement -- and your feelings.

Small Thing Big Idea, a TED original series, celebrates the lasting genius of everyday objects so perfectly designed that they changed the world around them. Check out more here: https://go.ted.com/STBI

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