Affad 23 in Sudan dating to 50,000 years ago when the climate in this region was more humid than during the African humid period. Two aurochs bones found in the Romito Cave in Italy were radiocarbon dated to 20,210 and 19,351 years BP. Aurochs bones found in a cave near San Teodoro, Sicily date to the Late Epigravettian 14,785–14,781 years BP. Fossils found at various locations in Denmark date to the Holocene 9,925–2,865 years BP. Mesowear analysis of aurochs premolar teeth indicates that it changed from an abrasion-dominated grazer in the Danish Preboreal to a mixed feeder in the Boreal, Atlantic and Subboreal periods of the Holocene. Description According to a 16th century description by Sigismund von Herberstein, the aurochs was pitch-black with a grey streak along the back; his wood carving made in 1556 was based on a culled aurochs, which he had received in Mazovia. In 1827, Charles Hamilton Smith published an image of an aurochs that was based on an oil painting that he had purchased from a merchant in Augsburg, which is thought to have been made in the early 16th century. This painting is thought to have shown an aurochs, although some authors suggested it may have shown a hybrid between an aurochs and domestic cattle, or a Polish steer. Contemporary reconstructions of the aurochs are based on skeletons and the information derived from contemporaneous artistic depictions and historic descriptions of the animal. Coat colour Remains of aurochs hair were not known until the early 1980s. Depictions show that the North African aurochs may have had a light saddle marking on its back. Calves were probably born with a chestnut colour, and young bulls changed to black with a white eel stripe running down the spine, while cows retained a reddish-brown colour. Both sexes had a light-coloured muzzle, but evidence for variation in coat colour does not exist. Egyptian grave paintings show cattle with a reddish-brown coat colour in both sexes, with a light saddle, but the horn shape of these suggest that they may depict domesticated cattle. Many primitive cattle breeds, particularly those from Southern Europe, display similar coat colours to the aurochs, including the black colour in bulls with a light eel stripe, a pale mouth, and similar sexual dimorphism in colour. A feature often attributed to the aurochs is blond forehead hairs. According to historical descriptions of the aurochs, it had long