Perhaps typography doesn’t interest you, but my associations with letter press printers, those odd creatures who print by taking the individual letters and putting them together into rows of type, running ink over them and creating art, has led me to enjoy and respect typographic oddities. Which brings me to the interrobang. You can find the detailed history of this mark–the only new punctuation mark of the 20th century–in a book called Shady Characters. You can get a taste of it here.
Designed to express both incredulity and overwhelming confusion of the modern age, the interrobang is both an exclamation and a question mark. Here are a few samples: