It has collections that include art and artifacts from ancient Sumerian, Babylonian, Akkadian, Assyrian and Chaldean civilizations - collections that put the Metropolitan Museum of Art and the Louvre to shame.
Basically, there's some old, ancient shizz in there. And amongst the old, ancient art are some jars with some really weird, unexplained figures on them.
Large bulging eyes: Check.
Weird wiggly arms: Check.
No Hair: Check.
More than five fingers (or is that less?): Check.
No lips: Check.
Weird elongated body: Check.
Therefore, Xorx is an alien.
Click here for more more extraterrestrial art (and some of the other jaw dropping pieces found in the Museum).
Because, If this ain't proof of aliens, I don't know what is.