Very interesting article. We hear only fleeting comments at best about these things..no TV specials or investigative shows..why? Such an interest subject!! There's physical evidence, giants also mentioned in the Christian bible as well. You can decide for yourselves why there is no little attention on this subject. The Smithsonian Museum is good at removing and hiding anything that pertains to creationism, in order to further evolution theory.
Fallen angels mated with human women creating Nephilim (flesh). Only Fallen Angels aka Demons are spirit going through wall, shape shifting appear as orbs in the sky. The offspring are flesh aka Nephilim giants, Greys, etc. and require a space craft to move around aka UFO. America, Russia and possibly others have created their own UFO's based off of the originals that have crashed (told to me by a Korean War Vet in the 1950's).