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angela
Doodling in Math: Spirals, Fibonacci, and Being a Plant [Part 3 of 3] - http://www.youtube.com/watch...
![Doodling in Math: Spirals, Fibonacci, and Being a Plant [Part 3 of 3]](http://i.ytimg.com/vi/14-NdQwKz9w/default.jpg "Doodling in Math: Spirals, Fibonacci, and Being a Plant [Part 3 of 3]")  |
January 25
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