An independent scholar from Cambridge University Uk has just published this fascinating take on the Belyaev farm fox experiment I reported in Not A Chimp. The effects on the HPA axis in the foxes, the range of neotenic traits revealed by simply selecting for friendliness and approachability, he believes tells us important things about the evolved human appreciation of beauty and the psychological traits we associate it with.
www.jstor.org/stable/10.1086/671486