Here is a very good dissemination work of PHD Comics I want to share with you, which explains what it is, and which illustrates very well how innovative communication serves, if properly achieved, a better understanding of science. Congrats to Jorge Cham who did the job!
xkcd is a webcomic created by Randall Munroe. The comic's tagline describes it as "a webcomic of romance, sarcasm, math, and language." It has been recognized in such mainstream media as The Guardian and The New York Times.