Yes there are loads of depictions of these so called 'visitors' in human art, structures and buildings going back 1,000's of years. Satan has been interacting with us since Eden, it won't stop until he's safely ensconced in the pit for 1,000 years then for just a short while after that and his end will come.
My point originally was that in 1947 there was an increase in these sightings, particularly area 51 and few other places in the world. This was against the backdrop of the US and Great Britain doing the deals to create the new state of Israel.
Satan knows 'about' God's plan, but doesn't know it all or how it works, so he was probably getting ready in case this was the Rapture being prepared also.
These sightings and interactions have been more or less of the same type and have increased in frequency since then. It surely means that Satan is preparing the world to accept that there is 'alien' life and it's not going to be beyond the imagination that this is why we're all now missing as those left behind will all have been well used to UFO sightings and that they do 'exist'.