Forty years ago, Hollywood made gremlins loveable—portraying them as adorable, furry creatures. Their folkloric origins are far more sinister.

In the aftermath of tragedies, it's easy to focus on the assignation of blame. But how well do we understand the causes of crushing crowds?

If Dracula represented the collective fears of his day, what do the likes of Slender Man and other internet monsters tell us about the zeitgeist of right now?