There may have been similar DNA beings around Eden, but there really was an Eden and an Adam and Eve, and the fall. Folksargue that Adam or his sons could not have sired children with such surrounding beings, but the fallen angels sired the NEPHILIM WITH THE DAUGHTERS OF MEN. The unique thing about the descendants of Adam is having a spirit. Humanoids surrounding the Garden likely did not have a spirit since God breathed Adam's into him.
Some so called “abductees” claim that when they asked “why they were taken” the so called “aliens stated” Each human seems to have an “animus” that is unique to even what they had studied “in the universe” and they were trying to get a handle as to what that was. Of course that seems to have been one of the “kinder alien species”. Other abductees seem to have sensed almost a sarcastic malevolence...noting that they were being refered to by these creatures as “containers”. Most of these “abductions” were most certainly demonic...especially the ones referring to humans spitefully as “containers”...containers for what...possible possession perhaps?
The “animus” studiers seemed to be most kinder, and mostly curious. It might be possible in the universe that some intelligent species don’t have the same sense of Eternity that God “has put into our fore-heads”, and God deals with them differently. It doesn’t matter though...Christ died for our sins and we have to worry about our souls before God ...not what God might have done about some other intelligent life-forms.
Most of these UFO experiences I believe to be demonic or related to the fights we all have with the “princes and powers of the air!” Whether or not God has allowed some curious space faring races to nose around a bit(before being warned off or eventually will be warned off as the hammer starts to fall on Earth)... is not our concern. Kissing the Son(as in Psalm 2)”before he has begun to get just a little angry” is our main concern!
Heb 12:2 Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God.