Quote - There is a tribe recently found in a remote are of Brazil, they have existed in complete isolation from all civilazation throughout history. They recently sighted an airplane and erected monuments to worhip it as a craft of the Gods, like we did in Sumeria, Lumeria, Egypt etc. with saucer spacecraft.

See -> Cargo Cult.
This is the premise underlying the StarGate series.

"Any sufficiently advanced technology is indistinguishable from magic." Arthur C. Clarke
See also the first two of Clarke's laws -> http://www.worldlingo.com/ma/enwiki/en/Clarke's_three_laws

Unfortunately nothing like the Babel fish has cropped up yet, so the possibility that God exists is still there.