In "El Castillo", Cantabria, Spain,'' a faint red dot'' is said to be more than 40,000 years old. <ref> [http://www.bbc.co.uk/news/science-environment-18449711 Red dot becomes 'oldest cave art'.] </ref> | In "El Castillo", Cantabria, Spain,'' a faint red dot'' is said to be more than 40,000 years old. <ref> [http://www.bbc.co.uk/news/science-environment-18449711 Red dot becomes 'oldest cave art'.] </ref> |