They say what you don't know can't hurt you, but we've all been hit in the face with enough frisbees to know that's demonstrably false. That said, what you do know can leave you with a creeping sense of existential dread and a lasting mark on your psyche. Because man, we live in a vastly unexplored and wildly unpredictable world full of flesh-eating wiener parasites and damning statistics about reading comprehension. Here are some strange science facts to ponder .