Linkage for the ides of March

The Schmidt arrangement, triangular rosettes of circles from number theory (G+)

Brückner, Vielecke und Vielflache (1900), with a tumblr post of some stellated polyhedra photographed in the book (G+)

$1000 prize for solving open problems in OEIS

MAA celebrates Women's History Month (G+)

Tensegrity robot video

Mini-biographies of five women scientists (G+)

Numberphile video on the diversity of human natural-language number systems

Interactive 3d fractal fly-through

Yet more Elsevier misbehavior (charging for access to open-access papers; G+)

Sad news of Jirka Matousek's death (G+)

Increasing attacks on academic freedom (G+)

Vi Hart throws cold water on the whole Pi day thing and how arbitrary it is (G+)

Folding de Bruijn graphs