2-D Goggles discusses measurements. If Ada Lovelace is 5 heads tall, then so is Tintin! Tiny Asterix is only 1,5 heads. Awww. :D Also: chibi versions of Lovelace and Babbage! If you haven't read the comic yet, READ IT NOW. Especially for nerds.
In the vein of nerdiness: the definition of a mathematician at Abstruse Goose.
Calamities of Nature warns against being a thermodynamist. Or a logician. Dangerous fields, those.
Xkcd shows us how nerd love dies: with a graph. An overly simplified one. Have I ever discussed xkcd here? It's the ultimate simply drawn strip: stick figures, graphs and pie charts, computers and wires. I frequently find it funny, and I equally frequently have to ask my nerd boyfriend about the references. It's interesting that I'd much rather look at this than a poorly drawn but colored Paint comic. Stick figures can be pretty OK, but when almost-cartoonish-looking humans have outlines of squiggly Paint lines, and everything is neon green and pink, it's just visually ugly. I think more online comic artists should go for black-on-white and stick figures.
Saturday Morning Breakfast Cereal has employed a xkcd-style graph, but also drawn characters. In this case, a winning combination. I also love all of the little details about how the human eye works. A pretty original look on the old "why?" conversations with children. (I'm linking to the gif image because the latest comic doesnt' seem to have an individual link that will work later. Just enlarge it. The main page is here.)
Then, to digress slightly, a nod to the Christian comics I posted about yesterday. Rock music: of the devil, see previous post. Here evidenced by Buttersafe.