Could spectres be real? Staff at Chester Castle think they have caught a ghost on camera. They are among the millions who believe in ghosts, despite scientific scepticism.
Historic castle shares ‘ghost’ picture
Spooky sighting: No one has been able to explain who — or what — the camera at Chester Castle captured that night. Glossary
Chester - A city in northwest England.
English Heritage - A charity that manages historic monuments and sites in England.
Mesopotamians - People who lived in a historical region of Western Asia, between the Tigris and Euphrates rivers.
Bible - The collection of religious texts that are central to Christianity. The Bible includes the Old Testament and the New Testament.
Prophet - Somebody with special powers to tell the wishes of God or a divine being.
Incorporeal - With no physical matter or existence.
YouGov - A British public opinion and polling company. It was co-founded by Nadhim Zahawi, a Conservative Party politician.
Laws of physics - Statements, based on repeated experiments or observations, that describe how the universe or world works. For example: Newton's Laws of Motion.
Ball lightning - A rare, unexplained phenomena in which a sphere of light appears in the sky, usually near the ground during thunderstorms.
Bermuda Triangle - A loosely defined triangular area in the North Atlantic ocean off the North American coast, in which multiple ships and airplanes are said to have "mysteriously disappeared".