TIL: As computations of the inbreeding coefficient of Charles II of Spain show, his infertility was probably caused by many generations of inbreeding by his ancestors. User Salt-Pile, in the Today I Learned (TIL) subreddit, 30 Aug 2017
What rampant incest will do to your dynasty... Interesting abstract. User bowlabrown, in the Crusader Kings subreddit, 01 Sep 2015
TIL that Charles II of Spain was so inbred, his genome was more homozygous than that of a child whose parents are siblings. User doxadoo, in the Today I Learned (TIL) subreddit, 06 Dec 2013
TIL Charles II of Spain was so inbred that his genome was more homozygous that that of a child whose parents were siblings. User doxadoo, in the Today I Learned (TIL) subreddit, 06 Dec 2013
The Role of Inbreeding in the Extinction of a European Royal Dynasty User mellowmonk, in the Reddit Science subreddit, 20 Apr 2009