The museum is HUGE - Nick and I spent over 4 hours wandering around the first three floors (and the third floor was a REALLY quick walkthrough)!!  A brand new museum with a Space room (the space center is in Inner Mongolia), Environment room, etc. on the first floor, then a whole floor to the Yuan Dynasty - Genghis Khan and his ancestors and other minority groups.  Quite thorough and amazingly accurate english!  (The Chinese use characters remember so other languages are not read by most Chinese.  Mongolians have their own language, which looks somewhat like an Arabic script.  Back to the emails ...