the ceiling of a cave at Altamira , Spain , is painted. Discovered in 1879. Accepted as authentic in 1902. * c. 14,000 BC : Domestication of Reindeer . * 13,000 BC : Beginning of the Holocene extinction event . 13,000 BC: earliest evidence of warfare   See Gimbutas - vieilleeurope.wordpress.com/2011/01/11/signs-out-of-time-the-story-of-archaeologist-marija-gimbutas