Huh, haven’t heard about the elongated skull bit. I’ll have to look into that.

The other theory is that the Sons of God are descendants of Seth and the daughters of men are the descendants of Cain. However, this theory doesn’t make much sense to me because it would be rather unremarkable if Cain and Seth’s descendants intermarried. After all, it’s not like they had any other options. Plus, such intermarriage wouldn’t produce giants (the nephilim) unless the genes for gigantism were already present in Adam and Eve’s DNA.

Then again, the theory that angels bred with humans raises questions of its own, like how on earth do angels mate with humans in the first place. This implies that angels (or at least the fallen ones) have a physical form and similar enough genetics to allow for procreation. Not to mention a genetic component the results in extra height/mass (maybe a gene that stimulates production of HGH?). Definitely agree that we don’t have the full picture on any of this.