Einstein dies and goes to heaven. At the Pearly Gates, Saint Peter tells him, “You look like Einstein, but you have NO idea the lengths that some people will go to to sneak into Heaven. Can you prove who you really are?” Einstein ponders for a few seconds and asks, “Could I have a blackboard and some chalk?” Saint Peter snaps his fingers and a blackboard and chalk instantly appear. Einstein proceeds to describe with arcane mathematics and symbols his theory of relativity. Saint Peter is...