XKCD is a webcomic with a difference. Usually populated by stick figures, it’s a highly intelligent and often thoughtful comic that deals near-exclusively in mathematical concepts and scientific theories. If all this sounds a bit heavy -going, he also peddles a mean fart joke.What If? is a recurring section on the site where people can ask the ex-NASA employee daft questions such as inquiring how far a steak would have to fall before it cooks; and Munroe will answer them by researching, hypothesising, and describing in […]