HERSHENSON M, MUNSINGER H, KESSEN W
Science. 1965 Feb 5;147(3658):630-1. doi: 10.1126/science.147.3658.630.
Newborn humans presented with pairs of shapes, each shape differing in number of turns (angles), prefer shapes with 10 turns to shapes with 5 turns or 20 turns, as inferred from photographic recordings of eye fixations.