according to the sumerians, aliens from the tenth planet created the adamu through genetic engineering of their own dna into a line of human like creatures with promise to do their work for them, then when they got sick of making them, through further genetic engineering they created the eve, or an adamu with an onboard womb and gave the humans a reproductive capacity.
the aliens then began to occasionally breed with the daughters of adamu producing super humans who became the kings under the gods who ruled mankind.
here are some links to that myth, and please excuse my paraphrasing.
none of these are too clear,but they have been used to discredit african historical accomplishment and primacy by saying that european civilization comes from aliens and not from africans, like the later is harder to believe for the predjudiced appologist european scholar. theres a book out called black athena by martin bernal