Let me start this post off by telling you all (if you don't already know) that I am a huge paranormal buff, and absolutely love reading about aliens, past lives, astral projection, time travel and all the variations and flavors of conspiracy on the net from Icke to Rense to Coast To Coast to Infowars..I eat it up. Can't get enough of the stuff.
Now I've personally seen a UFO, and am a believer. And there are some ancient works of art that exist that contains anomalies that could be seen as UFO's..But believing that the greys rocked out with Jesus Crizzle himself back in the day is a whole other story all together.
Artist and self-proclaimed abductee Monarca Lynn Merrifield makes paintings depicting Extra Terrestrials in biblical times. Take a look at her gallery and her site which has lots of intertesting links on it..Take it with a grain of salt, but some of these paintings are awesome, and worth checking out..(Scroll down for gallery)
(Click pic for more!)