I've heard of another base that is considered as mysterious and elusive as the infamous Area 51. Supposedly, this base is where they are taking things to now that Area 51's secrecy is known about, and the location is in Michigan. Something about it being called Area- possibly 52 or 31. Anyone know what I'm talking about or have heard of this?

None of the so called 'new area 51's' are actually new. They might be getting retro fitted and updated but they've all been in use for quite some time. Michigan, Utah, Colorado, California are all states other than Nevada that have a history of old test sights that see ufo spurts every once in a while.

Theres a place in Utah the USAF has dubbed area 6413. Interesting that 64-13=51 It's some where outside of Salt Lake City near the old Green Rivers test sight and not to far from White Sands. Colorado has several bases that are linked to air and space activity including the under ground (or mountain) headquarters of Space Command at Peterson AFB.