#4. Brian Palmer
Blog: Slate's Explainer
Brian Palmer explains things. Slate even refers to him as the "chief explainer," and for good reason, too. Basically, he's the Internet's equivalent of the "Answer Man." What would you like to know? Send Palmer a question and he'll explain it. It takes a bit of moxie to open yourself up to the Internet like that. (We're curious to know what kinds of questions he has declined to explain.) Some of our recent favorites: Are there gay dogs? Would your dog eat your dead body? (Yes.) Who would win a fight between a Neanderthal and a modern human? Many of his explanations are to questions that probably very few people have thought of, but the answers are fascinating nonetheless.