Linkage

Wooden mechanical etch-a-sketch clock (via, YouTube). The amazing senior project of Japanese design student Suzuki Kango.

Strong evidence that most large-scale real-world networks are not power-law graphs (G+, via). With bonus snark about the standards for model quality among physicists trained in statistical mechanics.

Archival activism: the editors fighting Wikipedia’s sexism problem. About the Women in Red group and their work to increase the number of biographies of women on Wikipedia.

In-browser dynamic simulation of many origami folds (via, also via).

The mother of all swipes , about Joan Ball, pioneer of what would now be called social media in 1960s England. Via a story about sexism, cover-ups of sexism, and intellectual appropriation among IEEE historians.

How the new Pennsylvania congressional redistricting will greatly simplify and shorten the borders between districts (G+).

Spiraling origami tessellations by Ekaterina Lukasheva (G+, via).

Good intentions, poor optics: BYU mathematics departments sets up a panel on women in mathematics whose four panelists are all male (G+).

Prime number (G+). Now a Good Article on Wikipedia.

Loxodromic symmetry of hyperbolic space), gorgeously animated by Roice Nelson.

The top science journals publish flashier papers, but are they better papers? (G+, via). This article suggests that, measured in terms of methodological quality, they are actually worse.

An engineer’s guide to sexism. A keynote speech by Teresa Meng to the International Solid State Circuits Conference on her experiences with sexism.

Alexandrov’s uniqueness theorem: surfaces that are locally Euclidean except for finitely many cone points whose angular defects add to \(4\pi\) can always be folded to form the surface of a unique convex polyhedron. Another new Good Article on Wikipedia.

Peace for Triple Piano and its “Making Of” video, by Vi Hart and Henry Segerman. Watch the first one on a viewer capable of interacting with spherical videos. Watch the second one to learn how the first one is actually a time crystal.