Stones, stars, mazes, and placentas.
McFarland
R B
RB
Rocky Mountain Branch of the Institute for Psychohistory, Boulder, CO.
D001108:Architecture / Q000266:history*; D001256:Astronomy / Q000266:history*; D005314:Embryonic and Fetal Development; D049690:History, Ancient; D049691:History, Medieval; D010920:Placenta; D012098:Reproduction; D013561:Symbolism