I thought Everyone "knew":
Psa 68:17
The chariots of God are twenty thousand, even thousands of angels: the Lord is among them, as in Sinai, in the holy place.
Ezekiel 1; God on Mount Sinai; the Ophannim (translated "wheels", in Ezekiel 1 and 10, but named by Enoch as "Ophanim", in the Book of Enoch, and the chariots of fire described in the Word..
Then, the fallen watchers who took daughters of Adam and got offspring by them, who taught men to make instruments of war, and every sort of flying vehicle before the flood. They had everything -and more, before the flood, that mankind has today. We are approaching those levels of technology again. As King Solomon said; "there is nothing new under the sun, all that is has already been done before"...chariots of fire, travel to the stars (planets are called "wandering stars" by the ancients, and the ancients traveled to them in "space chariots"). Even the ancient Chinese recorded they had gone to the moon and built a "crystal palace" on it.
In the Mahabharata, there are records of space ships, instructions for building them, and different fuels to propel them, and instructions on how to be invisible to enemy ships, and how to listen to enemies in their flying ships and how to see into enemy ships: and there are records of wars fought, on earth, between kingdoms using atomic bombs, and also another, worse, weapon of war that left buildings intact and destroyed all flesh....nothing new under the sun. It's all been done before.
These things were taught the sons of Adam by the fallen watchers, and Hitler's scientists sought the information to do these things again, and so, the modern "space" programs began, when the "allied nations" opened the doors to the Nazi scientists, like Werner Van Braun, after the war, they continued what they had begun, in NAzi Germany.
Ooparts & Ancient High Technology--Evidence of Ancient Atomic Knowledge?