Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Nov 3, 2018
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