Cavemen Were Better at Depicting Quadruped Walking than Modern Artists: Erroneous Walking Illustrations in the Fine Arts from Prehistory to Today
(The original colour picture can be found in the following website: http://pittkyle123.wordpress.com/2011/02/15/cave-paintings-30000-years-ago). The straight line represents the assumed ground line. LH: left hind leg, LF: left fore leg, RH: right hind leg, RF: right fore leg. This correct quadruped walking illustration falls in the cell Bb of the walking matrix.