"I Don't Know How You'll Survive When Our Genes Are Gone."

The epic scale of the lyrics to the Big Bang Theory is no accident. The whole show is  a metaphor for the creation of the human race from Cro-Magnon and Neanderthal. You see, recent research on the Neanderthal genome suggests interbreeding.

The genes for red hair and pale skin didn't match well enough to show a correlation, but I found a correlation for genes linked to other traits. There's a gene cluster linked to advanced mathematics skills, information processing, logic, analytical intelligence, concentration skills, obsession–compulsion and Asperger's syndrome. That cluster correlates very strongly.

and the bad news:

The hybridization was successful in the Stone Age, but the environment has changed. I found that modern culture selects for socialization but against the Neanderthal traits for mathematics and intelligence, ... I don't know how you'll survive when our genes are gone."

Feb'15 Apparently Asians got two helpings of Neanderthal genes.