Here's a scenario. I'm standing in a room I don't quite recognize, feeling a little uneasy. I turn and see a spider the size of a german shepherd on the wall that suddenly jumps at me. I wake up screaming. Sound familiar? Spiders may not be your specific trigger but you get the gist. Nightmares are fascinating. On today's episode we will look at some of the science behind nightmares and try to get some insight into why they happen.