Lots of time thinking about Voronoi Diagrams this week; click image for full-size or here for a high-res PDF.
Hand-drawn Logic Chip
Hand-drawn diagram for an experimental logic chip by Texas Instruments, circa 1976.
Via: Matthew Sontheimer (thanks!)
Tool wear temperature gradient
Very strange, very awesome. By Wikipedia user Shipwear; click for full-sized image.
Charlatan, Martyr, Hustler
Really great diagram (poetic data mapping?) by artist Joey Roth.