Back in 2007, Bower reported evidence that some of the Stone Age curving and crisscrossing lines on the ceilings of caves were created by children, suggesting that this «finger fluting» might have been a prehistoric form of finger painting (SN: 4/28/07, p. 264). (sciencenews.org)
By LEIGH DAYTON and MAGGIE McDONALD About 14 000 years ago an ice - age hunter painted three extraordinary bison on the ceiling of a cave. (newscientist.com)
These spiky mineral deposits, known collectively as speleothems, grow layer by layer as surface water percolates through the ground dissolving limestone as it goes, and finally forms droplets that hang from the ceiling of a cave. (climatecentral.org)