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Vintage Navigation Tools. The tools clock wise from left are: a) astrolabe, b) compass with transverse board, c) lead and line, d) quadrant, e) divider. How many did you get right ... me, none!

from io9

15 Uncanny Examples of the Golden Ratio in Nature

The famous Fibonacci sequence has captivated mathematicians, artists, designers, and scientists for centuries. Also known as the Golden Ratio, its ubiquity and astounding functionality in nature suggests its importance as a fundamental characteristic of the Universe.

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