Golden Angle Jigsaw
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"Like standard jigsaw puzzles, this puzzle has only one solution, but instead of every piece being a different shape and approximately the same size, every piece is the same shape and a different size. The placement of the pieces is based on the golden angle (≈137.5º), and results in a pattern frequently found in nature, for example on pine cones or sunflowers. The puzzle has 8 spirals in one direction, and 13 in the other."
source: http://curiosamathematica.tumblr.com/post...
source: http://curiosamathematica.tumblr.com/post...