Located in Chicago, the Museum of Science and Industry is the largest science museum in the western hemisphere. It offers over 2000 exhibits, displayed in 75 large halls. Some of zthem are highly acclaimed and include a working coal mine, a German submarine from World War II and a NASA spacecraft. Its good reputation makes it the third largest cultural attraction on Chicago.
This site does not use Typo3 any longer... or they they took the Typo3 HTML comments away!
Definitely TYPO3 still, you can see the URLs in the source code going to the typo3temp directory.
I guess they are using a customised version of TYPO3 4.1...