People on earth are a mix of the original people born here and different extraterrestrial civilizations.
The original Cosmic Plan was to create human beings originated on earth with no external influences. However, because earth is in a kind of cosmic highway, there were ETs that:
1) Crashed here without being able to go back to their planet.
2) Some where deported here.
3) There were some that came to earth because their planet was destroyed.
4) Some took Men's daughters as theirs and procreated hybrids which became the Atlantis civilization.
"And when the angels, the sons of heaven, beheld them, they became enamoured of them, saying to each other, Come, let us select for ourselves wives from the progeny of men, and let us beget children. Enoch 7:2"
"Then they took wives, each choosing for himself; whom they began to approach, and with whom they cohabited; teaching them sorcery, incantations, and the dividing of roots and trees. And the women conceiving brought forth giants. Enoch 7:10-11".
https://cosmicsong.org/index.php/references/book-of-enoch
Since then, all people on earth have on their DNA, sources from all.
Blood type RH negative, scientists attribute it to extraterrestrial origins. Since our common ancestor with primates which have the same 99% of our DNA don't have it. 10% of world population has it, mostly concentrated in France and Spain.