Aliens in D.U.M.B.'s ?
We know that America build Deep Underground Militairy Basis throughout the United States. There are statements from people who were working in those basis that there are certain levels (floors) where humans and aliens worke together on projects, and that there are levels where only aliens are admitted.
Here are some skull's they found, and claime that this is the product of the binding of the skull during the first years of growth. I dont see how that increases the brain volume to the dimensions shown by the skull's
And here is a skull who looks like the skull of the alien in the first picture.