Casey and AndyCasey and Andy.

Casey and Andy (stylised as Casey & Andy, or simply C&A) is a webcomic series written and illustrated by Andy Weir. Following the adventures of two mad scientists (fictionalized versions of Weir himself and his best friend Casey Grimm) and of their friends and acquaintances (such as writer Jennifer Brozek), it was typically updated three times a week, on Mondays, Wednesdays, and Fridays throughout the early 2000s, primarily with a gag-a-comic format, including ongoing storylines and running gags. The comic has a strong flavor of science and history fact, often from obscure sources, as well as featuring strong parallels between Weir's and Grimm's actual lives and the events in the comic.