Genesis 6:4 KJVS
[4] There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.
If this isn’t in your Bible, you might be reading the wrong Bible. The literal translation for “sons of God” is “the sons of elohim” which is plural for gods; heavenly beings. Today we wouldn’t say a being from the heavens (sky/outer space), we would say “extra-terrestrial”; not from earth.
The Bible states we were made in the image of “elohim”, which means extra-terrestrials. Literally, that’s what it says without exaggeration or reaching.
“And God (elohim; gods; heavenly beings; ETs) said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth.”
Is this inside your Bible?