Who knew bouncing balls could tell us so much about human history? In just four minutes, Hans Rosling takes us through the history of the world to show the fate of 200 countries over 200 years.
Who's getting sicker? Who's getting richer? You haven't seen the destruction of wars and the Spanish flu pandemic until you've seen them through Rosling's eyes.
Skip ahead to 0:30 to get right to the juicy parts.