Author Archives: gcochran9

Degüello

There’s a new paper out on the genetic prehistory of the Canadian Arctic. Basically, it says that existing Eskimos replaced a genetically different population less than 700 years ago, and that those earlier Paleo-Eskimos (Dorset culture) represent yet another separate … Continue reading

Posted in Amerindians, Eskimo | 40 Comments

The Wrong Path

Turning Pygmy hasn’t turned out to be a very good long-run strategy. All such populations have big problems.  First, they’re vastly outnumbered by peoples that adopted agriculture.  Second, they’re short – shorter than their farmer neighbors –  and generally that … Continue reading

Posted in Pygmies, Uncategorized | 64 Comments

Pygmification

A recent paper in PNAS talks about the  evolution of the Pygmies – or, more exactly, the Pygmy phenotype, because it seems to have happened independently in the Biaka Pygmies (west Africa) and the Batwa pygmies of Uganda.  The two … Continue reading

Posted in Uncategorized | 98 Comments

I can’t afford to think about that.

Once upon a time, a young geneticist was applying for a position at the University of New Mexico.  I believe he said something about the Ashkenazi hereditary diseases.  Someone on the faculty,  known to be susceptible to crimethink, asked him … Continue reading

Posted in Uncategorized | 166 Comments

Physics Today

I noticed an article in Physics Today, about educational techniques in physics. A couple of psychologists from Stanford were working with Carl Wieman,  talking about how to improve physics achievement in historically under-represented groups.  Seldom have have I seen such … Continue reading

Posted in Uncategorized | 93 Comments

Cystic Fibrosis

A friend of mine once had an encounter with a fairly prominent geneticist* who thought that there was only one clear example of heterozygote advantage in humans – sickle-cell.  Of course that is not the case: we know of a … Continue reading

Posted in Uncategorized | 79 Comments

Powerful Stuff

I was thinking again about that Denisovan allele of EPAS1 that plays a big role in Tibetan altitude adaptation.  Considering modern humans, it has only been found in Tibetans (high frequency) and in the Chinese (couple of percent).  The preferred … Continue reading

Posted in Altitude adaptations, Denisovans, Genetics | 18 Comments