Razib Khan’s Content Aggregation Site

  • Daily Data Dump – Monday

    One last week of summer. Models tell us more than hindsight. Tim Harford, the author of The Logic of Life, defends economics and modeling against a critique of a historian-turned-journalist. My main problem with economists isn’t that the field is formalized and expresses itself in equations. Rather, it’s the tendency to speak with greater force…

  • People with heterodox opinions are just confused

    I was having a touch of insomnia a few days ago, and wasn’t alert enough to do anything intellectually challenging, so I decided to poke around the General Social Survey. I found an interesting variable, POSTLIFE, which asks people if they believed in life after death. I decided to cross-check that against those who were…

  • Not all genes are equal in the eyes of man

    A few days ago I was listening to an interview with a reporter who was kidnapped in the tribal areas of Pakistan (he eventually escaped). Because he was a Westerner he mentioned offhand that to “pass” as a native for his own safety he had his guides claim he was Nuristani when inquiries were made.…

  • The pristine Amazon – a zone of contention

    Last week there was an article in The Washington Post that caught my eye, Scientists find evidence discrediting theory Amazon was virtually unlivable. The headline flattens a complex and roiling debate within academia. A generation ago the forests of the Amazon basin were seen as a pristine climax ecosystem. In the 1990s and 2000s […]

  • The confusions of genetic relatedness

    Last spring I posted ‘Beyond visualization of data in genetics’ in the hopes that people wouldn’t take PCA too far in assuming that the method was a reflection of reality in a definite fashion. Remember, PCA visualizations are showing you two, and at most three, dimensions in genetic variation within the data set at any…

  • Open thread, September 11th, 2010

    Well, it’s that day again. Nine years on, what’s changed? After Iraq, and the new quagmire in Afghanistan, it seems that our laser-like focus on what & who caused 9/11 is no longer with us. I can’t believe we haven’t caught Osama bin Laden yet. Look at what Eric Raymond is blogging about now vs.…

  • Friday Fluff, September 10th, 2010

    In the interests of “mixing it up” I’ve decided to try something different on Fridays (I’ve been blogging for eight years, but I’ll admit I haven’t been the most innovative of online content generators so far). I’m going to merge the cat pictures with other assorted potpourri. I envision regular features, so, for example, every…

  • George C. Williams, (1926-2010)

    Jerry Coyne notes that George C. Williams died a few days ago. I’d heard he was ill. Michael Ruse has an obituary up. Williams’ book Adaptation and Natural Selection prefigured Richard Dawkins’ The Selfish Gene. Update: Please see Car…

  • Leaping to a bigger brain

    Years ago an evolutionary biologist mentioned to me almost offhand that with the emergence of genomics and the necessity to master computational techniques a lot of the labor hours which may have gone into a more thorough understanding of specific organisms had gone by the wayside. He believed that his Ph.D. advisor was going to…

  • Offense in a globalized world

    In my post “The naked years” I used this image to illustrate the transition from furry Australopithecus, to hairless H. erectus, to the sartorially elaborated H. sapiens sapiens: Do you find the image offensive? I obviously didn’t, I’m not an artist and was trying to visually communicate a scientific concept, not “provoke.” My usual procedure…

  • Daily Data Dump – Thursday

    More on The Social Sensitivity Hypothesis. At A Replicated Typo a post which explores a model whereby different morphs emerge which migrate and flourish based on genotype. The “sensitive” and “non-sensitive” tendency is optimized for different ecologies, whereby in high resource zones the sensitives do better. The author expresses a lot of caution, but the…

  • The naked years

    When I talk about sexual selection I usually make sure to have an accompanying visual of a peacock to go with the post. But really I could have used a dandy as an illustration, or perhaps in our day & age “The Situation”. Unlike the peacock much of what passes for human “plumage” is not…

  • Fundamentalists are not as “intelligent”

    Yesterday I pointed to an OKCupid study on personals ads on their network. I didn’t highlight the fact that the analysis of the ads seem to suggest that secular people have more sophisticated prose, and that of those who claim a religious affiliation the less strongly committed tend to be more sophisticated. The blog Political…

  • After the codex

    Today we’re seeing a transition in the medium of literacy. I’m alluding to the emergence of digital formats, which will transform the physical experience of reading. You’re part of the process right now, unless you’ve printed this out. Of course we have books around, and we will for quite some time. I assume for the…

  • Daily Data Dump – Wednesday

    Human Meat Just Another Meal for Early Europeans? The argument about cannibalism always goes back and forth. It seems entirely plausible that at some point in our lineage’s history the consumption of conspecifics may not have been shocking, as the human cognitive toolkit had not evolved to the level of sophistication which makes cannibalism cross-culturally…

  • Sexual selection: lowered expectations edition

    Sexual selection is, for lack of a better term, a sexy concept. Charles Darwin elaborated on the specific phenomenon of sexual selection in The Descent of Man, and Selection in Relation to Sex. In The Third Chimpanzee Jared Diamond endorsed Darwin’s thesis that sexual selection could explain the origin of human races, as each isolated…

  • Daily Data Dump – Tuesday

    Big brains attributed to mother’s care. Interesting that the correlation between various characteristics and brain size is highly sensitive to the taxa you include in your scatter plot. Marsupials seem to be substantially different from placental mammals, while primates are different from placentals as a whole. Throwing all the mammalian taxa into the analysis results…

  • How much more racist are white conservatives than white liberals?

    A few weeks ago there were a bunch of stories on how white the audience was at Glenn Beck’s rally. That’s empirically true, and the Tea Party movement as a whole is overwhelmingly white. So is the American conservative movement. This in a nation which is ~65% white in a colloquial sense (i.e., white Hispanics…

  • Genetic differences within European populations

    One of the more popular posts on this weblog (going by StumbleUpon and search engine referrers) focuses on genetic variation in Europe as a function of geography. In some ways the results are common sense; populations closer to each other are more genetically related. Why not? Historically people have married their neighbors and so gene…

  • Daily Data Dump – Monday

    Happy Labor Day! Price’s First Equation. An in-depth review of the Price Equation. First installment of several. DNA fingerprinting pioneer discovers role of key genetic catalyst for human diversity. The strange behavior of PRDM9 could be thought of as a factor in the second term of the Price Equation. Resentment Simmers in Western Chinese Region.…

Razib Khan