IMG_6734 by dvdmnk (cc by)
In AskMetafilter, soylent00FF00 says, “I’ve learned that I was wrong (dead wrong!) about a couple of scientific “facts” that I had assumed were kind of “general knowledge” (for a certain nerdy sciencey kind of person), and asks, What sciencey general-knowledge “truths” did you (and presumably “everyone”) believe in, that you realized were not true?