I see dead people': why so many of us believe in ghosts

Between 30% and 50% of the population believes in ghosts – literature, philosophy and anthropology can explain why.

Are Ghosts Real? What to Know on Hauntings and Paranormal Activity

What Do Ghosts Feel? – Association for Psychological Science – APS

Many Americans Say They Believe in Ghosts. Do You? - The New York Times

Paranormal Technology: Gadgets For Ghost-Tracking : NPR

The intriguing history of ghost photography

My Sad Dead,” by Mariana Enriquez

Book recommendations: 5 new ghost story YA books : NPR

When a 19th-Century 'Spirit Photographer' Claimed to Capture Ghosts Through His Lens

Can Pets See Ghosts?