3 ms·The origins of a 7000 year old fairy tale9 points by rsj_hn 7y agoschoen 7y ago(2017); the original research is https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4736946/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4736946/ (2016).