Randall Munroe’s webcomic xkcd has plenty of sweet, goofy, and clever strips that appeal to anyone. I love silly ones like “Alternate Energy Revolution” – a mashup of War of the Worlds and Don Quixote – and the ambitious extra-large strips that show the scale of time and space or the dramatic impacts of climate change. But I often feel like I’m not getting as much out of the series as I could be.