Why do people believe in ghosts? And can science ever prove that they don\u2019t exist? We take a road trip with Dennis Waskul, a sociologist who traveled to graveyards and \u201chaunted\u201d houses to hear ghost stories, from the people who lived them. He wanted to find out why 50% of Americans believe in ghosts. What he discovered might spook you - in a good way! (Note: This episode is NOT scary.)