If you are in Philadelphia next month you might want to check out a wonderful exhibit at the University Museum. "Secrets of the Silk Road" is a wonder to behold. Unfortunately a featured element of the exhibit, the "Beauty of Xiahoe" has been removed at the request of the Chinese government. The problem: the "Beauty" [pictured above] is quite obviously caucasian and is visual evidence of the fact that the ancient inhabitants of Western China were not Chinese, something that the current regime wants to suppress.
There is a lecture series that accompanies the exhibit. Some of these are already online and can be viewed here.