Ghosh, Pallab (8 October 2014). "Cave paintings change ideas about the origin of art". BBC News. https://www.bbc.com/news/science-environment-29415716. "The minimum age for (the outline of the hand) is 39,900 years old, which makes it the oldest hand stencil in the world," said Dr Aubert. "Next to it is, and this is one of the oldest figurative depictions in the world, if not the oldest one," he told BBC News. There are also paintings in the caves that are around 27,000 years old, which means that the inhabitants were painting for at least 13,000 years."
doi.org
dx.doi.org
Pike, A. W. G.; Hoffmann, D. L.; García-Diaz, M.; Pettitt, P. B.; Alcolea, J.; De Balbín, R.; González-Sainz, C.; de las Heras, C. et al. (15 June 2012). "U-Series Dating of Paleolithic Art in 11 Caves in Spain". Science336 (6087): 1409–1413. doi:10.1126/science.1219957. பப்மெட்:22700921. Bibcode: 2012Sci...336.1409P. Abstract: "... minimum ages of 40.8 thousand years for a red disk, 37.3 thousand years for a hand stencil, and 35.6 thousand years for a claviform-like symbol".
harvard.edu
adsabs.harvard.edu
Pike, A. W. G.; Hoffmann, D. L.; García-Diaz, M.; Pettitt, P. B.; Alcolea, J.; De Balbín, R.; González-Sainz, C.; de las Heras, C. et al. (15 June 2012). "U-Series Dating of Paleolithic Art in 11 Caves in Spain". Science336 (6087): 1409–1413. doi:10.1126/science.1219957. பப்மெட்:22700921. Bibcode: 2012Sci...336.1409P. Abstract: "... minimum ages of 40.8 thousand years for a red disk, 37.3 thousand years for a hand stencil, and 35.6 thousand years for a claviform-like symbol".
nih.gov
ncbi.nlm.nih.gov
Pike, A. W. G.; Hoffmann, D. L.; García-Diaz, M.; Pettitt, P. B.; Alcolea, J.; De Balbín, R.; González-Sainz, C.; de las Heras, C. et al. (15 June 2012). "U-Series Dating of Paleolithic Art in 11 Caves in Spain". Science336 (6087): 1409–1413. doi:10.1126/science.1219957. பப்மெட்:22700921. Bibcode: 2012Sci...336.1409P. Abstract: "... minimum ages of 40.8 thousand years for a red disk, 37.3 thousand years for a hand stencil, and 35.6 thousand years for a claviform-like symbol".