optical illusion

[BillT]

Here is a really cool video to watch:

Rotating 3D printed objects and timing of taking the pictures makes for a cool effect:

http://www.fabbaloo.com/blog/2015/1/18/design-of-the-week-fibonacci-zoetrope-sculptures?utm_source=Fabbaloo+Newsletter&utm_campaign=31dc839716-RSS_EMAIL_CAMPAIGN&utm_medium=email&utm_term=0_f52584965b-31dc839716-113929457

Text explains the details.
You can purchase printouts of the objects in Shapeways (>$100; follow the links).

Fibonacci numbers are a sequence that goes:
0, 1, 1, 2, 3, 5, 8, ...   each new number in the sequence is the sum of the two previous numbers.
Fibonacci numbers are found in many natural things with repeated components like flowers, pine cones, and a variety of spiral patterns.

[PaulineMi]

That is really cool!

[Mugwump]

...now that's neat.....