Beautiful statistics

A researcher in Sweden, Hans Rosling, has come up with a new way of looking at correlations and statistics in a very visually pleasing way, check out the video here titled

"Debunking third-world myths with the best stats you've ever seen"

It gives you a sense of the world behind all those dry numbers and tables you usually see. I love it! I want to make graphs like that! How did he do it?