I saw this on the website Talking Points Memo, a very popular progressive website, who pulled it off of The You Tubes, the Internet version of the Library of Congress, only bigger and more global. And now I put it on my much, much tinier blog. That's what makes it "viral".
The guy's name is Hans Rosling and he teaches stats. He's really good.
He explains a data plot of 200 countries over 200 years, correlating average income and life expectancy. Give it a click. It's fascinating.
If you like this, wander over to The You Tubes and watch some more of his stuff. Like I said before, he's really good.
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