The Flannan Isles Lighthouse disappearances refer to a mysterious incident that occurred in December 1900 involving three lighthouse keepers stationed at the Flannan Isles Lighthouse, located on Eilean Mor, one of the Flannan Isles off the coast of Scotland.On December 15, 1900, a relief vessel arrived at the lighthouse to find that the three keepers, Thomas Marshall, James Ducat, and Donald MacArthur, were missing. The relief keeper, Joseph Moore, who was meant to replace one of the three, found the lighthouse empty. The beds were unmade, the clocks had stopped, and there were signs of a meal that had been interrupted. However, there was no sign of the keepers themselves.The disappearance sparked immediate speculation and intrigue. Various theories emerged, ranging from mundane explanations to more fantastical ones involving paranormal activity or foul play. Some suggested that a large wave or storm may have swept the men away, while others proposed that they were abducted by foreign spies or even abducted by extraterrestrial beings.Investigations were conducted, but no conclusive evidence was found to explain the disappearances. The mystery of what happened to the three lighthouse keepers has never been fully resolved, leading to continued speculation and interest in the case. It remains one of the most enduring mysteries in maritime history. Numerous theories and fictionalized accounts have been proposed over the years, keeping the story alive in popular culture.