talk of higher densities is NOT Nancy's creation, you should read other good sources of information on ET.
not the hard factual proof that doesnt exist that you are trying to valiantly to conjure. you will not be able to provide ample solid evidence for any of this. it has been structured like this.
thats why i choose to search in a different place.
you will be surprised to see talk of higher dimensions (densities) or reality amongst not only ET-related books and articles, but also within certain religions, beliefs, and ideals expressed throughout everywhere.
densities are simple. the atoms and molecular structure shift to a higher vibratory frequency. that is the mathematical/scientific way to look at it.
u can also look at it spritualy. you rise in consciousness to higher levels of existance, since you are gaining knowledge of the true universe, you are more aware, similar to vibrating faster, in a different light.
guys- densities are actually the answers you are looking for.
a) they will explain why aliens can appear/dissapear
b) explains how entities can be without any physical body at all
c) explains other (more earthly) phenomenom, such as Ghosts, poltergeists, etc.
d) explain possibly how Aliens are able to travel the universe almost instantaneously.
e) explains how some Humans are even able to project their Astral Bodies and fly around consciously thru space
f) explains out of body experiences.
it can explain alot of what we dont know.