Why do people see ghosts?

For Halloween, we explore ghost sightings - how to explain them, what research says and if there's an ethical imperative to acknowledge them.

Do you believe in ghosts? 'I thought it was normal to see people that weren't there

See What Might Be Civil War-Era Ghosts Caught on Camera at Gettysburg

The science of ghosts

Why do people see ghosts?

Why Some People See, Hear, Or Feel “Ghosts” · Frontiers for Young Minds

New Research Busts Myths Around What Really Happens When People 'See Ghosts', 2oceansvibe News

Why do we see ghosts?

SEE THE PIC: Pennsylvania mom 'too scared to sleep' after seeing ghostly figure on security camera

Brian Cox says CERN's LHC would have found ghosts if they existed

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

48 Scary Ghost Stories That Will Haunt And Horrify You

Ghost Hunting: Professional Tips