Politico's Philip Shenon delves into the past to ask what was Lee Harvey Oswald doing in Mexico just weeks before the JFK assassination, while Nick Redfern digs back to the early 1900s to find tales that Bigfoot-type creatures lived underground. Over 230 million years ago in what is now North Carolina, a 9-foot tall 'butcher crocodile' may have ruled the roost before dinosaurs came on the scene. A mysterious aurora was recently spotted in the Martian atmosphere by NASA's Maven craft, while amazing video footage of a giant cavern in Vietnam has been captured by a drone set up by photographer Ryan Deboodt.