2010-12-01 Hans Rosling's 200 Countries, 200 Years, 4 Minutes YouTube 本の虫: 寿命と所得の視覚化 YouTube - Hans Rosling's 200 Countries, 200 Years, 4 Minutes - The Joy of Stats - BBC Four *1 *1:Twitter / Akihiko Koizuka: おもしろいなー:本の虫: 寿命と所得の視覚化 htt ...