razib | October 14, 2009Is Harry Turtledove? Compare the similarity in output to Patterson. I just noticed that Glenn Reynolds received a copy of Turtledove's second book in a quasi-alternate history series he's been working on. Turtledove shines when he's applying what he knows. Even if the Videssos cycle wasn't artful prose, the books had plots which moved along, while his historical, Justinian, had incredible source material to work with. But a lot of his more recent production just crawls along, rather like the later books in The Wheel of Time. Additionally, I have to say that some of it definitely has an almost…
razib | October 14, 2009
A few days ago I pointed to a paper, Stature, Mortality, and Life History among Indigenous Populations of the Andaman Islands, 1871-1986. It looks at the specific case of the Andaman Islanders to explore the general phenomenon of "pygmy" populations, especially among "Negritos." The Andaman Islanders are an interesting test case, as the authors note, because the disparate groups have taken different stances toward interaction with the outside world. The Great Andaman Islanders have mixed for over a century with the British and Indian settlers. The Onge began to interact with the outside…
razib | October 14, 2009Reading the papers on Ardipithecus ramidus which just came out in Science one of the take-home points that jumps out at me is that extant apes may be very misleading analogs to extinct hominins. Here is Owen Lovejoy:
In retrospect, clues to this vast divide between the evolutionary trajectories of African apes and hominids have always been present. Apes are largely inept at walking upright. They exhibit reproductive behavior and anatomy profoundly unlike those of humans. African ape males have retained (or evolved, see below) a massive SCC and exhibit little or no direct investment in their…
razib | October 13, 2009It's been a few weeks, but I thought I would point you to an interesting post on OkCupid's blog about race and dating. They report an interesting trend of preference for white men among all groups of females, as well as lots of other interesting nuggets. Of course, as many have noted the core demographic of OkCupid is a bit different than the general population, and might be especially so when it comes to racial minorities. I did think though that the stated racial preferences of the sample are interesting in light of other data which suggest women are more racialist than men.
In all classes…
razib | October 13, 2009I'm talking about coeliac disease:
Coeliac disease is caused by a reaction to gliadin, a gluten protein found in wheat (and similar proteins of the tribe Triticeae, which includes other cultivars such as barley and rye). Upon exposure to gliadin, the enzyme tissue transglutaminase modifies the protein, and the immune system cross-reacts with the small-bowel tissue, causing an inflammatory reaction. That leads to a truncating of the villi lining the small intestine (called villous atrophy). This interferes with the absorption of nutrients, because the intestinal villi are responsible for…
razib | October 13, 2009A new paper adding some decimal places on Indian mtDNA phylogeography, Updating Phylogeny of Mitochondrial DNA Macrohaplogroup M in India: Dispersal of Modern Human in South Asian Corridor:
To construct maternal phylogeny and prehistoric dispersals of modern human being in the Indian sub continent, a diverse subset of 641 complete mitochondrial DNA (mtDNA) genomes belonging to macrohaplogroup M was chosen from a total collection of 2,783 control-region sequences, sampled from 26 selected tribal populations of India. On the basis of complete mtDNA sequencing, we identified 12 new haplogroups…
razib | October 12, 2009I've talked about menopause before. One question in evolutionary anthropology is whether it is an adaptation, a derived trait in our species which emerged due to the force of natural selection, or simply a physiological byproduct of some other phenomenon. The key point is the peculiar asymmetry in male and female reproductive potentials; males decline gradually over time, while the general suite of female reproductive function simply shuts down at during middle age. Eric Michael Johnson reviews a new paper by the redoubtable Virpi Lummaa, Fitness benefits of prolonged post-reproductive…
razib | October 11, 2009Eliezer Yudkowsky is on bloggingheads.tv with one of my favorite producers of brain-candy, the statistician Andrew Gelman. Here is Eliezer's An Intuitive Explanation of Bayes' Theorem, and David Spiegelhalter's article on Bayesian statistics in Scholar pedia (which Gelman refers to favorably).
razib | October 11, 2009Stature, Mortality, and Life History among Indigenous Populations of the Andaman Islands, 1871-1986:
Despite considerable interest in the evolution of small body size, there is little evidence for changes in body size within smallâbodied human populations. This study combines anthropometric data from a number of studies of the body size of Andaman Islanders from 1871 to 1986. The colonial history of the Andaman Islands is characterized by high rates of mortality among the indigenous populations. However, longâterm conflicts between tribal groups of the Andaman Islands and British and Indian…
razib | October 11, 2009Eric Michael Johnson has a post up, Does Taking Birth Control Alter Women's Sexual Choices?, where he surveys a new paper,Does the contraceptive pill alter mate choice in humans?. Eric notes:
The concern of the researchers is that a woman who gets involved with a guy while on the pill might find that she's no longer compatible with him once she stops later on in the relationship. Imagine waking up next to your boyfriend, or even your husband, one morning only to discover that you're just not that into him. While female comedians make such scenarios commonplace in their stand-up routines,…
razib | October 11, 2009About two weeks ago I pointed to the peculiar disjunction between what a paper on Indian genetics actually said, and how people, including some of the researchers who contributed to the paper, were spinning it. For instance, the finding that South Asians can be reasonably modeled as a two-way admixture between "Ancestral North Indians" (ANI) and "Ancestral South Indians" which varies in ratio between between 7:3 and 2:3 across regions & caste groups was translated into "the genetic unity of India." And now I notice in The Guardian another Indian has an article titled Tracing the fissures…
razib | October 10, 2009Dienekes points to a new paper which attempts to quantify the genetic ancestry of South Asian Muslims into indigenous and exogenous components:
Islam is the second most practiced religion in India, next to Hinduism. It is still unclear whether the spread of Islam in India has been only a cultural transformation or is associated with detectable levels of gene flow. To estimate the contribution of West Asian and Arabian admixture to Indian Muslims, we assessed genetic variation in mtDNA, Y-chromosomal and LCT/MCM6 markers in 472, 431 and 476 samples, respectively, representing six Muslim…
razib | October 9, 2009A friend pointed out to me that the regular brown guys on bloggingheads.tv (Reihan Salam, and to a far lesser extent Ramesh Ponnuru and myself)
1) have names that start with "R"
2) lean Right
razib | October 9, 2009More Singularity stuff. I'm Not Saying People Are Stupid, says Eliezer Yudkowsky in response to my summary of his talk. The last line of his post says: "I'm here because I'm crazy," says the patient, "not because I'm stupid." So the issue is craziness, not stupidity in Eliezer's reading. The problem I would say is that stupid people have the "Not Even Crazy" problem. They often can't get beyond their basic cognitive biases because they don't have a good grasp of a rational toolkit, nor are they comfortable and fluent in analysis and abstraction. I can grant that many smart people are wrong or…
razib | October 8, 2009Copenhagen dreaming: In defense of the scientific method:
As the Copenhagen conference on the successor to the Kyoto Protocol draws near, I want to lay some meta-thoughts out about the scientific method which I think are important, as a context for my general support of the theory of global warrming and the need for decisive action by our own nation to reduce carbon emissions and embrace alternative forms of energy (including nuclear). The next post in this series will then lay out my position on global warming specifically.
razib | October 8, 2009From Matt Springer of Built on Facts. For what it's worth, many people at the Summit were skeptical of Kurzweil's specific vision. I mean in the audience, not just among the speakers.
razib | October 8, 2009For Gun-Shy Consumers, Debit Is Replacing Credit:
Visa announced this spring that spending on Visa debit cards in the United States surpassed credit for the first time in the company's history. In 2008, debit payment volume was $206 billion, compared with credit volume of $203 billion. MasterCard reported that for the first six months of this year, the volume of purchases on its debit cards increased 4.1 percent, to $160 billion, in the United States. Spending on credit and charge cards sank 14.8 percent, to $233 billion.
"Consumers are rational thinking individuals, and they're going to…
razib | October 7, 2009My thoughts on the talks at The Singularity Summit 2009 below the fold....
Shaping the Intelligence Explosion - Anna Salamon: A qualitative analysis of the implications of the emergence of artificial general intelligence. Having talked to Anna before, and knowing the general thrust of the work of the SIAI, not too surprising. AGI will come fast if it comes, it will be beyond our comprehension, etc. The main issue with Anna's talk was that it was hurried at the end, so perhaps we missed some points.
Technical Roadmap for Whole Brain Emulation - Anders Sandberg: Interesting. Lots of pictures.…