Linkage for the end of a short month

The Harriss spiral (G+)

Wind-carved towers of sand and ice

Beachbot, a giant etch-a-sketch for your local beach (G+)

Linkages that can draw any algebraic curve (G+)

Precursors to the Penrose tiling in the works of Kepler and the Islamic architects

Instant-runoff demo (G+)

Women in mathematics (G+)

Big Bang Theory Eye of the Tiger Scene (G+)

Why using git is good scientific practice

Klam values and other colorful neologisms from the parameterized complexity crowd (G+)

Timsort is broken (and has been for the past 12 years) (G+)