Going through the clues again I paused at the Blue man picture with the markings on the forehead.

[link to images2.wikia.nocookie.net]

It reminded me of something I had seen but just couldn't remember.

This picture reminds me of what ET's from Sirius B are alleged to look like.

I think they are humans who left planet Earth many many centuries ago.



AND



Like with all these things some of this may be true and some may be incorrect.