A Somerset tourist attraction has denied changing the way its exhibits are dated for reasons of political correctness.
Cheddar Caves Museum is using Before Present (BP) labels rather than Before Christ (BC) because it is easier to understand, a spokesman claimed.
"We'd still use AD and BC when a piece can be dated, but BP when its age is effectively prehistoric," he said.
BP dating is a year-numbering system counting back from 1950.
Although not usually used in museums, it is used by scientists when carbon dating.
Hugh Cornwell, director of the Cheddar Caves museum said the last thing he wanted was to cause any offence.
"We have had more than 200,000 visitors to the museum since it opened and about one-in-ten sign the visitors' book," he said.
"There is about one comment about the use of BP per thousand visitors.
"If anything I'm surprised we don't get more comments about the portrayal of cannibalism in society."