xkcd

xkcd is a webcomic of romance, sarcasm, math, and language updated every Mondays, Wednesdays, and Fridays. xkcd was created by Randall Munroe, a former contractor for NASA, in September 2005.

The subject matter of the comic varies, including statements on life and love (some love strips are simply art with poetry), and mathematical or scientific in-jokes. Some strips feature simple humor or pop-culture references.