Hans Rosling and the Magic Washing Machine

Hans Rosling is an amazing presenter.  I love how he uses humor and engages the audience.  He will act out parts of the story he is telling.  In the video above, he has someone hand him books from inside the washing machine to demonstrate that the opportunity cost of washing by hand is forgoing the education you could get if you had a washing machine.

Hans also has a really good talk about how humans' standard of living has been rising over time in which he uses a really cool data visualizaiton that he helped create.  It's pretty widespread now.