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The highly entertaining Vi Hart is back with another episode of Doodling in Math Class. Her videos are fun to watch, clear and easy to understand, and express the joy of scientific discovery:
This pattern is not just useful, not just beautiful, but inevitable. This is why science and mathematics are so much fun. You discover things that seem impossible to be true and then get to figure out why it's impossible for them to not be.
-via Make
Related: a wonderful cartoon by Abstruse Goose that makes the same point.
And I think Chris is right about that Fibonacci cocaine :D