Neither of us knows whether others from another time have left earth, OzmO. The very point you decided to challenge then abandon, practically all in a single post.
Ahh no.
Do you know anything about archeology?
Do you know what composite materials are?
Based on your consistant flawed logic the answer is obviously no. Unless you believe people found a way get into space using only wood and stone lol.
Once again you have been talking straight out of your ass.
You should get out more. Try taking a flight across the country. Ask yourself how it could be done with out composite materials. While In flight read a book about how the archeological process works.
Then maybe you won't have to look like retard covering your ignorance with flawed logic word games all the time.