Ancient Jomon people not like present-day East Asians – “‘We found a unique genetic position of the Jomon people who had diverged before the diversification of most of present-day East Eurasian populations including East Eurasian Islanders. This indicates that Jomon people were a basal population in East Eurasia and genetically isolated from other East Eurasians for long time.'” – h/t charles!
Uncovering the Genetic History of the Present-Day Greenlandic Population – “[W]e analyzed ∼200,000 SNPs from more than 10% of the adult Greenlandic population (n = 4,674). We found that recent gene flow from Europe has had a substantial impact on the population: more than 80% of the Greenlanders have some European ancestry (on average ∼25% of their genome). However, we also found that the amount of recent European gene flow varies across Greenland and is far smaller in the more historically isolated areas in the north and east and in the small villages in the south. Furthermore, we found that there is substantial population structure in the Inuit genetic component of the Greenlanders and that individuals from the east, west, and north can be distinguished from each other. Moreover, the genetic differences in the Inuit ancestry are consistent with a single colonization wave of the island from north to west to south to east. Although it has been speculated that there has been historical admixture between the Norse Vikings who lived in Greenland for a limited period ∼600–1,000 years ago and the Inuit, we found no evidence supporting this hypothesis. Similarly, we found no evidence supporting a previously hypothesized admixture event between the Inuit in East Greenland and the Dorset people, who lived in Greenland before the Inuit.” – h/t razib!
Y chromosome super-fathers – “Most of these lineages are so young that there are good chances that their founders were figures from history or mythology.” – from dienekes.
Bone Tool Discovered at Neanderthal Site in France – “A bone tool from the Grotte du Bison at Arcy-sur-Cure in France is further evidence that Neanderthals had abilities usually attributed solely to modern humans….”
Early age of alcohol initiation is not the cause of alcohol use disorders in adulthood, but is a major indicator of genetic risk. A population-based twin study. – “The association between early age of alcohol initiation and alcohol use disorders in later life does not reflect a causal relationship, but is due almost entirely to common genetic risk factors.”
α-Actinin-3: Why Gene Loss Is an Evolutionary Gain – h/t billare! who tweeted: “Positive selection for broken proteins: Derived ACTN3 mutation seems to help fast-twitch muscles fatigue less slowly.”
Do viruses make us smarter? – “[R]etroviruses seem to play a central role in the basic functions of the brain, more specifically in the regulation of which genes are to be expressed, and when.”
Estimating the genotypic intelligence of populations and assessing the impact of socioeconomic factors and migrations – from davide piffer who tweeted: “New version of my paper with genetic distances. Migrations or drift less likely to explain results.” also, from the paper: “The results also provide preliminary evidence in favor of the hypothesis that poor environmental conditions (i.e. economic and sociocultural) tend to depress national IQ scores. Countries with lower per capita GDP and a lower index of Human Development tended to have larger positive ‘residuals’, that is the difference between the score predicted by the regression (of IQs for developed countries on the 4 SNPs g factor) and the actually measured IQ was larger in countries with lower GDP and HDI (r around 0.7). Thus, poorer and less developed countries have yet to reach their full intellectual potential. The results of this study indicate that the gaps in intellectual performance between some populations can be narrowed via adequate improvement of environmental conditions, however the overall pattern of intellectual scores is due to relatively stable and fixed (genetic) factors and cannot be substantially altered.” – see also terrific post from anatoly karlin on this paper!: Genetics, IQ, and Convergence.
Evidence of polygenic selection on human stature inferred from spatial distribution of allele frequencies – also from davide piffer.
Geographical Variation in Dementia: Examining the Role of Environmental Factors in Sweden and Scotland – “We found a 2- to 3-fold geographical variation in dementia odds in Sweden, after twin random effects — likely to capture genetic and shared environmental variance — were removed. In Scotland, we found no variation in dementia odds in childhood but substantial variation, following a broadly similar pattern to Sweden, by adulthood. Conclusion: There is geographical variation in dementia rates.” – h/t erwin schmidt! – also Genetics and Underlying Pathology of Dementia.
Archaeogenomic insights into the adaptation of plants to the human environment: pushing plant–hominin co-evolution back to the Pliocene – “The colonization of the human environment by plants, and the consequent evolution of domesticated forms is increasingly being viewed as a co-evolutionary plant–human process that occurred over a long time period, with evidence for the co-evolutionary relationship between plants and humans reaching ever deeper into the hominin past. This developing view is characterized by a change in emphasis on the drivers of evolution in the case of plants. Rather than individual species being passive recipients of artificial selection pressures and ultimately becoming domesticates, entire plant communities adapted to the human environment.” – h/t george perry!
Son of Edar – “[S]omebody should look for characteristic racial differences in tears, sebaceous glands, Meobomian glands, and salivary glands. And possibly fingernails. They may well exist, be driven by this EDAR mutation, and some might play a role in its selective advantage.” – from greg cochran.
Quality vs Quantity – “To the extent that human capital is a product of genetic factors (quite a lot), this tradeoff *does not exist*.” – also from greg cochran.
Lower mortality rates among Asian, Hispanic lupus patients – “Asian and Hispanic patients with systemic lupus erythematosus (SLE) have lower mortality rates compared to Black, White, or Native Americans with the disease, scientists have found. Findings indicate that the risk for death among White patients is much lower than in Black and Native American SLE patients.”
Is your face special? – “Face recognition is highly heritable and weakly related to *g* so it probably has its own module, or a favoured set of circuits which only partly taps into the central processor power of general intelligence. So, not only is your face is special. but your specialised ability to recognise faces is even more special.” – from dr. james thompson.
Environment, more than genetics, shapes immune system – “Everyone’s immune system is slightly different—a unique mixture of hundreds of these cells and proteins. But the main driver of this variation is unclear. Although scientists know that our immune system can adapt to our environment—that’s why vaccines work, for instance—it is also built by our genes…. After recruiting 210 identical and fraternal twins between 8 and 82 years old, Davis and colleagues took blood samples and measured more than 200 parameters of their immune systems. For example, they measured the numbers of 95 kinds of immune cells and 51 kinds of proteins. Today, the researchers report online in Cell that identical twins’ immune systems were too different for the variation to boil down to genetics. Indeed, environment overshadowed inheritance in three-quarters of the measurements, and half showed no measurable genetic influence. Moreover, younger twins were more similar than were older twins, evidence that as the twins aged and were exposed to different environments, their immune systems diverged over time.”
Levels of Selection Are Artefacts of Different Fitness Temporal Measures – “I show by comparing the fitness of individuals with that of collectives of individuals in the same environment and over the same period of time – as required to decide if one or more levels of selection is acting in a population – that the selection of collectives is a by-product of selection at the individual level; thus, talking about two or more levels of selection represents merely a different perspective on one and the same process.”
Does incidental disgust amplify moral judgment? A meta-analytic review of experimental evidence [pdf] – “We meta-analyzed all available studies, published and unpublished, that experimentally manipulated incidental disgust prior to or concurrent with a moral judgment task (k=50). We found that there is evidence for a small amplification effect of disgust (d=.11), which is strongest for gustatory/olfactory modes of disgust induction. However, there is also some suggestion of publication bias in this literature, and when this is accounted for, the effect disappears entirely (d=-.01). Moreover, prevalent confounds mean that the effect size that we estimate is best interpreted as an upper bound on the size of the amplification effect. The results of this meta-analysis argue against strong claims about the causal role of affect in moral judgment and suggest a need for new, more rigorous research on this topic.” – h/t stuart ritchie!
The Coming Stability? The Decline of Warfare in Africa and Implications for International Security – “The years 2010–2013 saw an increase of 35 per cent in African battle deaths over 2005–2010, but they still are 87 per cent lower than the 1990–1999 average…. Consequently, there is no Africa exception to the systemic shift towards lower levels of armed conflict.” – h/t mugwump!
The Scariest Explanation for America’s Vast Prison Population: We Want It That Way – “[I]n federal prisons at least, Hispanics have overtaken blacks in the dubious distinction of being the most disproportionately imprisoned. Nor can we blame the war on drugs. The idea that vast numbers of Americans are in prison for smoking pot or snorting blow turns out to be a fantasy. About 20 percent of inmates are in for drug-related crimes, but those crimes are rarely limited to their own casual use. According to a 2004 estimate, only about 12,000 people were incarcerated for simple possession, without intent to traffic or distribute.”
Sorry, liberals, Scandinavian countries aren’t utopias – “Finland, which tops the charts in many surveys (they’re the least corrupt people on Earth, its per-capita income is the highest in Western Europe and Helsinki often tops polls of the best cities), is also a leader in categories like alcoholism, murder (highest rate in Western Europe), suicide and antidepressant usage….” – [huh. even with all that tango dancing!] – “It turns out that the ‘warrior gene’ — actually the enzyme monoamine oxidase A, which is linked to impulsive behavior, violence and alcoholism — is especially prevalent in Finland. ‘Dark’ doesn’t just describe winter in the Arctic suburbs, it applies to the Finnish character.” – h/t ninja economics!
The relationship between anti-gay prejudice and the categorization of sexual orientation – “[I]ndividuals reporting higher levels of anti-gay bias appear to be less accurate judges of sexual orientation.” but “Italians reporting greater anti-gay bias miscategorized fewer gay faces as straight.” – h/t ben southwood!
Legal Recognition of Same-Sex Couples and Family Formation – “It has long been debated how legalizing same-sex marriage would affect (different-sex) family formation. In this article, I use data on OECD member countries for the period 1980–2009 to examine the effects of the legal recognition of same-sex couples (through marriage or an alternative institution) on different-sex marriage, divorce, and extramarital births. Estimates from difference-in-difference models indicate that the introduction of same-sex marriage or of alternative institutions has no negative effects on family formation…. In addition, the country-by-country case studies provide evidence of homogeneity of the estimated effects.”
Pair-Bonding, Romantic Love, and Evolution – The Curious Case of Homo sapiens – “We conclude there is interdisciplinary support for the claim that romantic love and pair-bonding, along with alloparenting, played critical roles in the evolution of Homo sapiens.”
Sex ratio effects on reproductive strategies in humans – among the makushi people of guyana.
Antiquity of dairy farming in Ireland revealed – “Research published today in the Journal of Environmental Archaeology shows that dairying on the island goes back approximately 6,000 years, revealed through traces of ancient dairy fats found in pots dating to around 4,000 to 2,500 BC.” – h/t frau katze!
A Breeder Apart: Farmers Say Goodbye to the Bull Who Sired 500,000 Offspring – “Fans Commemorate ‘Toystory,’ a Dairy Legend With a Ravenous Libido” – the genghis khan of bulls! h/t mr. robert ford!
Items lost in the Stone Age are found in melting glaciers – “Mittens, shoes, weapons, walking sticks – lost in the high mountains of Norway thousands of years ago – are now emerging from melting ice.”
bonus: ‘I can haz genomes’: cats claw their way into genetics – “Canine dominance bows to tabby chic as cat sequencing takes off.”
bonus bonus: Some Microbes Can Eat And Breathe Electricity – whoa.
bonus bonus bonus bonus: Two New Studies Posit At Least Two New Planets Out Beyond Pluto
bonus bonus bonus bonus bonus: Whaleworld: Looking for cetacean culture – h/t steve stewart williams! who tweeted: “Millions of years before human culture appeared, there was culture in the ocean.” – cool!
bonus bonus bonus bonus bonus bonus: Medieval Apps.
bonus bonus bonus bonus bonus bonus bonus: Archaeologists find 132-year-old Winchester rifle leaning against Nevada desert tree
bonus bonus bonus bonus bonus bonus bonus bonus: Irn Bru release 57 Scottish tartan labels and clan finder website promotion (~_^)
bonus bonus bonus bonus bonus bonus bonus bonus bonus: “At some German crossings you can play a game of Pong with the person standing at the other side.” (^_^)
bonus bonus bonus bonus bonus bonus bonus bonus bonus bonus: If birds in a truck fly, does the truck get lighter? – hey…don’t bogart that joint, new scientist!
bonus bonus bonus bonus bonus bonus bonus bonus bonus bonus bonus: Kareem Abdul-Jabbar to Publish a Novel About Sherlock Holmes’s Brother Mycroft – danced a few dances with kareem! (^_^) (not a euphemism. for anything!)
(note: comments do not require an email. i can haz genomz?)