How do scarab beetles, holy water, and Batman relate to electricity? Check it out in the comic entitled Circuit Diagram at xkcd.com, a “Webcomic of Romance, Sarcasm, Math, and Language” created by Randall Munroe. I found the online comic after reading a story, “Why Not Say It Simply? How About Very Simply?” on the NPR website. At first glance, the comic Circuit Diagram looks like a circuit diagram—you’ll recognize the basic structure even if you’re not a scientist or engineer. But don’t just glance. Look at the details. I ended up crying I was laughing so hard.