TED Talk: How not to be ignorant about the world

Hans Rosling, global health expert and data visionary, one of the greatest speakers ever on TED, right beside Ken Robinson, Shawn Achor, and so many more.

How much do you know about the world? Hans Rosling, with his famous charts of global population, health and income data (and an extra-extra-long pointer), demonstrates that you have a high statistical chance of being quite wrong about what you think you know.