QUOTE (Draco18s @ Feb 13 2009, 12:11 PM)

Same, though not for the same
reason.
I had some friends like that, and their best explanation was that the Bible specifically mentioned them in Genesis. They cited how Cain left Adam and Eve and had children in the land of Nod (IIRC). They were like "Well Cain got married to someone, so that was the Others. Other humans that the Yaweh God didn't make." They were moon-worshipping neo-pagans who believed their 'moon-goddess' made their ancestors.
Well, Cain left with his wife, who was also his sister. For the majority of the Bible, women's births weren't noted.
However, they were partially correct, although dramatically misguided. In Genesis 6:1-4, we learn that "The sons of God came into the daughters of man, and they bare children to them. And they were giants in those days, mighty men of old, men of renown; the Nephilim." (DISCLAIMER: paraphrased for clarity).
The sons of God are obviously angels. When asked about the resurrection body, Jesus said something to the effect of "And you will be like the angels in heaven," specifically meaning that you won't need to procreate. So, if the sons of God came into the daughters of man, and the angels in heaven don't need to procreate, that leaves the Fallen angels the progenitors of the Nephilim.
Did you know that some of the earliest depictions of Zeus and Hercules had horns? Hercules: the son of a god, a massively powerful man capable of great feats of strength. Goliath: a man who's power is so legendary that his name itself is still used to refer to a giant, powerful creature.
It's interesting to note that scientists have found that 99.9% (maybe 99.8, I forget exactly) of all men are descended from a single male ancestor, who is referred to as "Y Chromosome Adam". I believe that to be extraordinary evidence of the Biblical account of human origins, and Genesis 6:1-4 explains the other 0.1-0.2%.