Sumerian cuneiform tablets from roughly 6000 years ago, perhaps???
or babylonian?
or maybe Amorite?
or maybe Hittite?
or Harran?
or Egyptian?
or other ancient civilization?
most of the writings from those mentioned (above) include reference to "gods" who "from Heaven to Earth came"
a winged disc is prominent across cultures and millenia, as are depictions of flying machines: "whirlie birds", "Whirlwinds", "big black birds"
all that would picture the "gods" to be wearing helmet, earphones and other paraphenalia in carvings.
part of the sacred temple space in each city, was the "heaven earth bond" and landing pad/garage set up for the flying machine of that "god".
The winged disc in the hieroglyphs was widely known as Nibiru, another planet within our solar system with a BINARY orbit and entering our solar system approx every 3600 years.
Ancient civilizations knew WAY more than us about astronomy/cosmology/cosmogony, healing/surgery/medicine, building (pretty much everything).
Think about this Sumerians, Babylonians and Egyptians all knew about neptune, uraneus, and pluto MILLENIA before we "discovered" them in the 1700's.