This spooky season, IFLScience is taking you on a journey between science and superstition, to a dimension of imagination akin to The Twilight Zone. For the next several hundred words, we are going to ask you to believe in ghosts. We will build a case for how ghosts can work within the natural laws of the universe before the scariest of all branches of physics comes to crash our fun. While physics is my domain, we need to raise a question that pertains to the world of biology: Why are ghosts in stories and folklore overwhelmingly human? And not just any human, modern humans – Homo sapiens. The…