Why the pencil is perfect | Small Thing Big Idea, a TED series
发布时间 2018-11-03 16:36:03 来源
摘要
Why are pencils shaped like hexagons, and how did they get their iconic yellow color? Pencil shop owner Caroline Weaver takes us inside the fascinating history of the pencil.
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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