Linkage for the end of an arbitrary temporal measurement unit

This year's graph drawing contest (G+)
Ian Agol reviews knot and link volumes (G+)
How to turn crossing surfaces into interwoven meshes
Leonardo, Rapunzel and the mathematics of hair
Impossible-tribar torus link (G+)
World of Wikipedia fantasy map by Jon Robson
Moneyball for academics
Greco-Latin squares, integer divisibility, the binary number system, and more, represented in kniitting
Free book on the singularities of real algebraic curves by Étienne Ghys (G+)
Maarten Löffler's holiday puzzle, involving coloring arrangements of circles (G+)
Humorous image captions in Wikipedia: not allowed (G+)
Tomás Saraceno's cloud cities (polyhedral wireframe art) at SFMOMA
Remnant LiveJournalers panic over server move to Russia
Sidedness is a property of embeddings, not of surfaces