Friends, I do have a lengthy study thread going about GIANTS, Sons of God (angels) and Daughters of Men By Bob Deffinbaugh, Th.M. (yes I think they did breed) and the antediluvian creatures called the NEPHILIM (which means fallen ones), tons of information, you can check that out at the link below, and don't miss the last page posts 51 and 53, regarding the interlocking, precision cut stone structures of Puma Punku in Bolivia:
http://av1611.com/forums/showthread.php?t=896