Two presidents were shot on a friday. The names of the assassins, john wilkes booth and lee harvey oswald, each contained 15 letters. Lincoln and kennedy were each succeeded by southerners named johnson. Sometimes things that we think are coincidences, in fact, are not coincidences. We're not very good at probabilities.
Why are humans so fascinated by coincidences? What do Carl Jung and an album by The Police have in common? And what did Stephen win in a bar mitzvah limbo contest?