Axial twist theory(en.wikipedia.org)
166 points by lordnacho | 43 comments
First screen, captured .
Looks similar
Artificio de Juanelo(en.wikipedia.org)
86 points by benbreen | 10 comments
Alexander Abian(en.wikipedia.org)
15 points by apollinaire | 4 comments
Iceland Spar(en.wikipedia.org)
19 points by Thevet | 2 comments
Wends of Texas(en.wikipedia.org)
63 points by benbreen | 37 comments
Cleo (Mathematician)(en.wikipedia.org)
246 points by djoldman | 55 comments
Wikipedia article on Cleo, the pseudonym of Vladimir Reshetnikov, known for posting precise answers to hard integrals on Math Stack Exchange without showing work.