[Numbers 24:21-22] And he looked at the Kenite, and took up his discourse and said, “Your dwelling place is enduring, and your nest is set in the cliff.  “Nevertheless Kain (Cain) will be consumed; how long will Asshur keep you captive?”
Asshur is located in ancient Sumer, the land of Nod to which Cain sojourned, East of Eden, which was between the rivers Tigris and Euphrates in Chaldea. In Nod Cain found a wife and so he introduced his genes to the Sumerians. From this clash, around 5800 years ago, here and there, giants emerged. The heavenly genes clashed with earthly genes producing unusual offspring, which due to inbreeding (because of the giants' enormous size) all eventually died out.
In Light Of New Findings
Dr. Lahn’s researches examined the DNA of 1,184 people around the world — though not in racially mixed areas like North America, Russia and Australia. They estimated that one undamaged variation, microcephalin haplogroup D (let us call it variation one, or V1) first appeared around 40,000 BC and has since spread to some 70 percent of humans.
Lahn’s paper on the recent evolution of the human brain asserts that new versions of two genes are currently spreading through the human population, and that these genes are more prevalent in some geographic regions than others. He has speculated that these genes may be linked to brain size and intelligence and has wondered if the mutations—one of which took place roughly 40,000 years ago, the other, 5,800 years ago—correlate with the development of art, written language, and the founding of cities. And he stepped on more than a few feet when he noted that, geographically speaking, the changes had occurred pretty much everywhere but sub-Saharan Africa.
"The brain has an emotional center and it has a rational center. Pursuing science, at least the execution part, has to do with the rational center, but what I do, which includes pursuing science, and what I like and don’t like, comes from the emotional center. We don’t know how that works, but it doesn't mean that it ceases to have an important function."