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Here are parts two and three of Vi Hart’s brilliant and dizzying exploration of the Fibonacci number, plant growth patterns, and the mathematics behind other cool, spiraly things.

More:
Spirals, Fibonacci, and Being a Plant

Gareth Branwyn

Gareth Branwyn is a freelancer writer and the former Editorial Director of Maker Media. He is the author or editor of a dozen books on technology, DIY, and geek culture, including the first book about the web (Mosaic Quick Tour) and the Absolute Beginner’s Guide to Building Robots. He is currently working on a best-of collection of his writing, called Borg Like Me.


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