Over the past two weeks, J.C. Bradbury of Sabernomics has been looking into a series of interesting issues at the fantastic Olympics-Reference blog, like this question from ESPN Insider's Keith Law: "Why are there no good figure skaters from Scandinavia?" (Bradbury and his readers blame Communists and Nazis, which is OK by me.)
To me, Bradbury's most interesting Olympics work is about how athletes age. Below is the average age of medal winners in individual sports that have appeared in at least four Winter Olympics: