Archives for posts with tag: bacteria

Oxytocin helps explain difference in social perception between men and women“‘The Love Hormone’, Oxytocin affects men and women differently in social contexts — in men it improves the ability to identify competitive relationships whereas in women it facilitates the ability to identify kinship.”

Watching Bacteria Evolve, With Predictable Results“[I]n experiments using bacteria and other fast-breeding organisms, scientists can replay evolution many times over in their labs. And the results of a new experiment published Thursday in the journal Cell Reports demonstrate — with movies — that evolution can be astoundingly predictable.”

Facial contrast and femininity“Women have higher luminous contrast between their facial skin and their lip/eye color. This contrast effect is influenced not only by degree of lightness but also by degree of redness.” – from peter frost.

Caste“An endogamous group that is exposed to unusual selective pressures – say because of their occupation – is going to change in response to those particular selective pressures.” – from greg cochran.

Cultural influences on IQ – from elijah armstrong.

Human cells respond in healthy, unhealthy ways to different kinds of happinessEudaimonic well-being was, indeed, associated with a significant decrease in the stress-related CTRA gene expression profile. In contrast, hedonic well-being was associated with a significant increase in the CTRA profile.”

Even George W. Bush Has Heart Disease“Contrary to what we’ve been led to believe, it is possible – and indeed quite likely – that heart disease is an inevitable consequence of living. In other words, lifestyle, including what you eat, drink, where you work, how much you work out, etc, may have little to nothing to do with your chances of developing heart disease.” – from jayman. (the most surprising thing that i learned from this post is that george w. bush actually has a heart! (~_^) )

Students Today “Hook Up” No More Than Their Parents Did in College

Rare footage of isolated Amazon tribe released“A newly released video captures images of the Kawahiva tribe, indigenous people living in Brazil’s Amazon jungle thought to have had very little contact with the outside world.”

World’s oldest temple built to worship the dog star“THE world’s oldest temple, Göbekli Tepe in southern Turkey, may have been built to worship the dog star, Sirius.”

These Carvings Are the Oldest Rock Art in America, by Thousands of Years“‘The true age of this rock art had not been known, but a new analysis suggests these petroglyphs are the oldest North America, dating back to between 10,500 and 14,800 years ago.’ The rocks occupy a spot in the Nevada desert once covered by Winnemucca Lake.”

Oldest Gaming Tokens Found in Turkey“Small carved stones unearthed in a nearly 5,000-year-old burial could represent the earliest gaming tokens ever found, according to Turkish archaeologists who are excavating early Bronze Age graves.” – they’re really neat!

Good-looking birds: Sexual attractiveness in the wild turkey“[A]ttractiveness in male turkeys is more a function of how they use their genes, rather than differences in the genes themselves.”

bonus: Britain’s biggest child sex grooming gang thought to have been busted after cops arrest 45 men – here we go again. =/

bonus bonus: Olinguinto: ‘Overlooked’ mammal carnivore is major discovery

bonus bonus bonus: Moment thief was caught on camera stealing village ‘honesty box’ to pay for homegrown fruit and veg – this happened in south wales and the thief was a guy named paul bujega bujega.

bonus bonus bonus bonus: Scientists Finally Pronounce Human Genome“‘It’s Gatcaatgaggtggacaccagaggc…’”

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Questions you never thought to ask: Is inbreeding bad for democracy? – i thought to ask. so did a few other people (way before me!): steve sailer, stanley kurtz, parapundit. see also Cousin Marriage and Democracy. and, of course, see also woodley and bell. and see Question of the Day @breviosity. previously: consanguinity and democracy.

A Dose of Clannishness and What’s So Bad About Clanocracy? – @breviosity!

Where do those tensions come from?“When the Milgram experiment was done with Jordanian assistants, they were just as willing as Americans to inflict pain under orders (62.5%). But they were more willing than Americans [1.4%] to inflict pain when no orders were given, with 12.5% of them delivering shocks right up to the top end of the scale (Shanab & Yahya, 1978).” – great post from peter frost!

Modern Europe’s Genetic History Starts in Stone Age“Scientists create the first detailed genetic history of modern Europe.” – original research article. see also mtDNA haplogroup H and the origin of Europeans (Brotherton et al. 2013) from dienekes.

As women live longer and have fewer children, they are becoming taller and slimmer, study finds“‘This is a reminder that declines in mortality rates do not necessarily mean that evolution stops, but that it changes.’”

Birth Defects, FBD Marriages – from anatoly.

HBD Fundamentals – from jayman!

Why the Tropics are an evolutionary hotbed“Ant family tree shows tropical New World hosts fast speciation while also keeping older lineages alive.”

Study: People Who Believe in God Are More Responsive to Treatment of Depression“It may be that ‘the tendency to have faith in conventional social constructs’ can be generalized both to religion and the medical establishment.”

Beauty isn’t skin deep – @mangan’s.

Social psychology fraud: Just tell professors what they want to hear – from steve sailer.

Book Review: Quiet – The Power of Introverts in a World That Can’t Stop Talking (2012) by Susan Cain – from staffan. and a classic: Caring for Your Introvert. (just shush already! (~_^) )

Ethnic origins of Forbes world billionaires (2013) – @race/history/evolution notes.

Computer scientists suggest new spin on origins of evolvability“‘[E]volvable species accumulate over time even without selective pressure.’” – in their computer simulations.

Culture — Not Just a Human Thing – vervet monkeys got culture. also Parrots Barter With Nuts.

Humans Evolved Flexible, Lopsided Brains – some of us more lopsided than others. (~_^)

When Do Babies Become Conscious?“New research shows that babies display glimmers of consciousness and memory as early as 5 months old.”

Fish win fights on strength of personality“When predicting the outcome of a fight, the big guy doesn’t always win suggests new research on fish.”

Feeding our gut bacteria meat may enhance heart disease risks“Antibiotics or vegetarian diets block production of a risk-associated chemical.”

On Hold: Genes That Pause Pregnancy Discovered

Giza Secret Revealed: How 10,000 Pyramid Builders Got Fed“This meat-rich diet, along with the availability of medical care (the skeletons of some workers show healed bones), would have been an additional lure for ancient Egyptians to work on the pyramids…. ‘They probably got a much better diet than they got in their village….’”

Earliest Mayan monuments unearthed in Guatemala. see also Ancient Maya discovery sheds new light on the origins of civilization.

bonus: Levels of Commitment to the Dark Enlightenment – @habitable worlds. also What are characteristics of the Dark Enlightenment? @occam’s razor.

bonus bonus: How Cuban Villagers Learned They Descended From Sierra Leone Slaves“The amazing story of the traditional songs and dances, passed down over hundreds of years, that have tied a small Caribbean ethnic group to a remote African tribe.” – cool story!

bonus bonus bonus: Revealed: The Indian village with just 6,000 inhabitants … but more than 100 pairs of twins – another town of twins!

bonus bonus bonus bonus: Can Animals Be Mentally Ill?

bonus bonus bonus bonus bonus: not a news story, but here’s the definition of stubborn – Last Two Speakers of Dying Language Refuse to Talk to Each Other

bonus bonus bonus bonus bonus bonus: Thanks to rare alpine bacteria, researchers identify one of alcohol’s key gateways to the brain“Discovery is a step on the road to eventually developing drugs that could disrupt the interaction between alcohol and the brain.” – cool! wait. they want to disrupt the effect of alcohol on the brain?! hey!

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Low-hanging fruit?“We need to go beyond intelligence and look at genetic differences that may underlie variation in personality traits, regulation of emotions, time orientation, and so forth. There is more to being human than just intelligence. – yes!! (^_^) – from peter frost.

this is kinda old (from jan) but i just came across it: Variants at serotonin transporter and 2A receptor genes predict cooperative behavior differentially according to presence of punishment“We show that variants at the serotonin transporter gene (SLC6A4) and serotonin 2A receptor gene (HTR2A) predict contributions to the public good in economic games, dependent upon whether contribution behavior can be punished.”

Genetic Influences on the Overlap Between Low IQ and Antisocial Behavior in Young Children“Genetic influences common to both phenotypes explained 100% of the low IQ–antisocial behavior relation in boys.” – via race/history/evolution notes.

Monkeys Stay Away from Mean People“Capuchin monkeys show biases against humans who deny help to others.”

Genetic study of house dust mites demonstrates reversible evolution

Do species exist? – from steve sailer.

Fungus, Get Off My Lawn!“Virginia wildrye, common on U.S. prairies and rangelands, often plays host to a fungus that helps this grass grow. But the plant pays a price. Researchers have discovered that infected plants produce less pollen than their noninfected counterparts. Instead, the fungus causes the rye grass to make extra seeds, which transmit the fungus to the next generation and new locations. This is the first time a fungus has proven capable of manipulating plant reproduction.” – manipulator!

E. O. Wilson vs. Jerry Coyne: The Group Selection Wars Continue – from helian.

Pathogens: Cause or Effect of Social Variation?

Can People’s Personalities Change?“[P]ersonality was the strongest predictor of satisfaction with life. This is well-established and helps explain why some people have everything and are never satisfied and some people have next-to-nothing and seem quite happy with life. It’s not just what you have that makes you satisfied (or not), it’s how you think about it. And those habits of thought are heavily influenced by personality.”

Difficult Thoughts“It’s depressing to see how irrational we are so much of the time, but there it is.” – from malcolm pollack.

The Shape of History“Ian Morris, historian on a grand scale.”

bonus: Mystery bug found in Antarctica’s Lake Vostok“There is something alive in Lake Vostok, deep beneath the East Antarctic ice sheet, and we don’t know what it is. Water samples from the lake contain a bacterium that does not seem to belong to any known bacterial groups….”

bonus bonus: The Dark Enlightenment and the Eco Fringe – paleo retiree goes all hippie on us. (~_^) (i’ll confess right now to being a tree hugger myself.)

bonus bonus bonus: foseti’s drunken rant – i love drunken rants! (~_^) (this one actually makes sense!)

bonus bonus bonus bonus: Only the toughest would survive on Tatooine worlds – h/t hbd bibliography!

bonus bonus bonus bonus bonus: Butt munchers“[S]ea cucumbers can eat through their anuses.”

(note: comments do not require an email. sea cucumber – i don’t know if that’s the front end or the back….)

(sorry. the dog ate my sunday linkfest….)

And Yet Another Tale of Two Maps – from jayman.

Why are girls and boys maturing earlier? – from peter frost.

When Did Humans Come to the Americas?

Large study shows substance abuse rates higher in teenagers with ADHD“When the adolescents were an average of 15 years old, 35 percent of those with ADHD histories reported using one or more substances, as compared to only 20 percent of teens without ADHD histories.”

Tribal societies and war – from mangan.

Crime and Twins – from dienekes.

HVGIQ: Cayman Islands – from jason malloy.

Evil Genes and the Long Dark Tea Time of the Soul – @bad data, bad!

Digging Deep in the DNA“‘I think I’m one of the few people,’ she said, ‘who have taken the rectal temperature of a grizzly bear.’”

Men are from Mars Earth, women are from Venus Earth“That men and women approach their social world similarly does not imply that there are no differences in average scores between the sexes. Average differences do exist, write the authors.” – yes, average differences do exist.

Exercise linked with reduced prostate cancer risk in Caucasians but not African-Americans“Studies have also revealed that African-American men have an increased risk of developing prostate cancer and of dying from the disease compared with Caucasians.”

Gene today, gone tomorrow: Genes for autism and schizophrenia only active in developing brains“Genes linked to autism and schizophrenia are only switched on during the early stages of brain development, according to a study in mice led by researchers at the University of Oxford.” – curioser and curioser….

The Lab Accident That Led to the Discovery of Supertasters“A cloud of chemicals. One researcher detects a smell. The other does not. What happens next? Science.”

So THAT’s why women’s feet and hands are always cold! Why they are slaves to their hormones

On Genteels – @bloody shovel.

Oral Mystery: Are Agriculture and Rats Responsible for Tooth Decay?“Tooth decay is a relatively modern problem. The bacteria feasting on your teeth might have originated in the mouth of a rodent, and found their way to our teeth, thanks to agriculture.”

bonus: ‘Google for spies’ draws ire from rights groups

bonus bonus: ‘It’s a boy!’ Monkey midwife delivers baby

bonus bonus bonus: What Are Dogs Saying When They Bark? [Excerpt]“Experiments have now shown that dogs use different barks and growls to communicate different things.” – see also: Your dog really does understand you… They’re more likely to steal food if they think you can’t see, research reveals.

bonus bonus bonus bonus: Pigeons Get a New Look“Pigeons, a Darwin favorite, carry new clues to evolution.”

bonus bonus bonus bonus bonus: Do plants ‘veto’ bad genes?“Latest evidence fails to quell doubt about whether plants can access “ancestral” genes outside their parents’”

bonus bonus bonus bonus bonus bonus: Face-to-face with the earliest ancestor of all placental mammals

bonus bonus bonus bonus bonus bonus bonus: Penicillin Mold Can Reproduce Sexually, Which Could Lead to Better Antibiotics“Penicillin-producing fungus, previously thought to be asexual, has a sexual side. The finding is the latest in a kind of sexual revolution in fungal genetics.”

bonus bonus bonus bonus bonus bonus bonus bonus: Fast Food Robot Builds the Perfect Burger – won’t need mexicans for flipping burgers anymore.

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Finland & Japan – exceptions to “the rule”? – from jayman!

Genetic pacification in medieval Europe – from peter frost!

Scientists May Have Finally Unlocked Puzzle of Why People Are Gay – an epigenetic cause of gayness?

Restless Genes – drd4.

Reconstructed Face of Extinct “Hobbit” Species Is Startlingly Humanlike

Polymorphisms and Load – (more stuff i barely understand) from greg cochran!

Penn Study shows resistance to cocaine addiction may be passed down from father to son – in rats anyway.

Where to be born vs. where people are being born – from the awesome epigone!

The mu opioid receptor genotype may be a marker for those who drink for alcohol’s rewarding effects – OPRM1.

bonus: Lead poisoning in Samurai kids linked to mom’s makeup

bonus bonus: OU Study Suggests the Bacterial Ecology That Lives on Humans Has Changed Dramatically in the Last 100 Years

bonus bonus bonus: Microbiome: Cultural differences“Studies of gut bacteria are beginning to untangle how diet affects health in old age — but determining cause and effect is tricky.”

bonus bonus bonus bonus: Art of cheese-making is 7,500 years old

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a day late. sorry! sometimes sh*t just happens. (~_^)

Ethnic disparities in breast cancer survival remain despite socioeconomic similarities“All-cause survival was worse for African-Americans and better for Latinas and Asian-Americans compared with non-Latina whites after adjusting for age, study and tumor characteristics. When the researchers additionally adjusted for treatment and reproductive and lifestyle factors, they found that African-Americans had similar survival rates to non-Latina whites, but the survival rates of Latinas and Asian-Americans remained better.”

Diversity may be fatal, says new government health study“[P]eople suffer less cancer and heart disease when they live among their racial or ethnic peers.” – via mangan’s.

If Smart Is the Norm, Stupidity Gets More Interesting“Human intelligence varies.” – you don’t say?! (it’s in the nyt, believe it or not!)

Do Intelligent People Drink More Alcohol? – yes. yes, we do. (*hic*)

A detour through Europe?“The lithic technology of southwestern France (c. 22,000-17,000 BP) strangely resembles that of the first paleo-Amerindians (c. 12,000). Some people speculate that early Europeans reached North America by crossing the Atlantic. The truth is even more incredible. Early Europeans spread eastward and became the ancestors not only of the Amerindians but also of East Asians.” – from peter frost.

Secular change in the B/W IQ gap (in the US) – from chuck. see also steve sailer.

Penis size and infant mortality – from the autistic nerdling epigone.

Placebo effect may be ‘down to genes’“Those with a particular version of the COMT gene saw an improvement in their health after placebo acupuncture.”

The Evolution of Female Bisexuality – from jayman.

Pitch Perfect: It’s All In The Genes” – maybe/prolly. see also you, too, can have perfect pitch!

Hispanic Bio-Diversity: A Primer – from nelson.

Smoking causes asthma in second generation offspring – epigenetic effects in rats.

Epigenetic inheritance is a wild goose chase“Epigenetics matters, but not between generations.”

Appearance-based politics: Sex-typed facial cues communicate political party affiliation – republican women more feminine looking than democrat women.

Men better multi-taskers than women: study

Who Would Win in a Fight: a Modern Human or a Neanderthal?“We beat them at evolution. But what about fisticuffs?”

The Island Where People Forget to Die“[P]eople on Ikaria were, in fact, reaching the age of 90 at two and a half times the rate Americans do. (Ikarian men in particular are nearly four times as likely as their American counterparts to reach 90, often in better health.) But more than that, they were also living about 8 to 10 years longer before succumbing to cancers and cardiovascular disease, and they suffered less depression and about a quarter the rate of dementia.”

bonus: More Intelligent Birds (Like More Intelligent Humans) Have Evolutionarily Novel Preferences

bonus bonus: Electric Bugs: New Microbe Forms Living, Deep-Sea Power Cables

bonus bonus bonus: New study sheds light on how and when vision evolved“Opsins, the light-sensitive proteins key to vision, may have evolved earlier and undergone fewer genetic changes than previously believed….”

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Welsh people could be most ancient in UK, DNA suggests

Genomics and African queens“[The researchers] found that the genomes of some Ethiopian populations bear striking similarities to those of populations in Israel and Syria, a potential genetic legacy of the Queen of Sheba and her companions.”

Opiate of the Male Masses“How big of a problem, really, does pornography cause for men?” – from dennis mangan.

Study suggests poor mothers favor daughters“Poor mothers will invest more resources in daughters, who stand a greater chance of increasing their status through marriage than do sons…. On the contrary, mothers who were better off financially favored sons over daughters.” – an example of the trivers-willard hypothesis. research article. h/t linton! (^_^)

Liberalism rankings by country – from the audacious epigone.

Study Finds People Who Believe In Heaven Commit More Crimes“A study published in the scientific journal PLoS One by University of Oregon’s Azim Shariff and University of Kansas’s Mijke Rhemtulla finds that people who believe in hell are less likely to commit a crime while people who believe in heaven more likely are to get in trouble with the law.” – i thought the concepts of heaven and hell usually went together?

Declining testosterone levels in men not part of normal aging, study finds“‘Men who had declines in testosterone were more likely to be those who became obese, had stopped smoking or were depressed at either clinic visit.’”

bonus: Never-before-seen microbes found in Chile’s desert

bonus bonus: All 786 Known Planets To Scale – from xkcd. (^_^)

bonus bonus bonus: EU should ‘undermine national homogeneity’ says UN migration chief“Peter Sutherland told peers the future prosperity of many EU states depended on them becoming multicultural.”

bonus bonus bonus bonus: Jogging in forest twice as good as trip to gym for mental health

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