Right angles and spheres marker on a ball gif
Adam Rifkin stashed this in Math!
Stashed in: gifs, Oddly Satisfying
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Elliptic geometry: http://en.wikipedia.org/wiki/Non-Euclidean_geometry
It's oddly satisfying:
http://reddit.com/r/oddlysatisfying/comments/2pxy4b/right_angles_and_spheres/
3:10 PM Dec 21 2014