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[1709.01149] Biotechnology and the lifetime of technical civilizations
The number of people able to end Earth's technical civilization has heretofore been small. Emerging dual-use technologies, such as biotechnology, may give similar power to thousands or millions of individuals. To quantitatively investigate the ramifications of such a marked shift on the survival of both terrestrial and extraterrestrial technical civilizations, this paper presents a two-parameter model for civilizational lifespans, i.e. the quantity L in Drake's equation for the number of communicating extraterrestrial civilizations. One parameter characterizes the population lethality of a civilization's biotechnology and the other characterizes the civilization's psychosociology. L is demonstrated to be less than the inverse of the product of these two parameters. Using empiric data from Pubmed to inform the biotechnology parameter, the model predicts human civilization's median survival time as decades to centuries, even with optimistic psychosociological parameter values, thereby positioning biotechnology as a proximate threat to human civilization. For an ensemble of civilizations having some median calculated survival time, the model predicts that, after 80 times that duration, only one in 1024 civilizations will survive -- a tempo and degree of winnowing compatible with Hanson's "Great Filter." Thus, assuming that civilizations universally develop advanced biotechnology, before they become vigorous interstellar colonizers, the model provides a resolution to the Fermi paradox.
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october 2017 by nhaliday
Plastic fibres found in tap water around the world, study reveals | Environment | The Guardian
Scores of tap water samples from more than a dozen nations were analysed by scientists for an investigation by Orb Media, who shared the findings with the Guardian. Overall, 83% of the samples were contaminated with plastic fibres.

We are living on a plastic planet. What does it mean for our health?
New studies reveal that tiny plastic fibres are everywhere, not just in our oceans but on land too. Now we urgently need to find out how they enter our food, air and tap water and what the effects are on all of us

The US had the highest contamination rate, at 94%, with plastic fibres found in tap water sampled at sites including Congress buildings, the US Environmental Protection Agency’s headquarters, and Trump Tower in New York. Lebanon and India had the next highest rates.

...

Current standard water treatment systems do not filter out all of the microplastics, Mahon said: “There is nowhere really where you can say these are being trapped 100%. In terms of fibres, the diameter is 10 microns across and it would be very unusual to find that level of filtration in our drinking water systems.”

Bottled water may not provide a microplastic-free alternative to tapwater, as the they were also found in a few samples of commercial bottled water tested in the US for Orb.

Sea salt around the world is contaminated by plastic, studies show: https://www.theguardian.com/environment/2017/sep/08/sea-salt-around-world-contaminated-by-plastic-studies
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september 2017 by nhaliday
The Flynn effect for verbal and visuospatial short-term and working memory: A cross-temporal meta-analysis
Specifically, the Flynn effect was found for forward digit span (r = 0.12, p < 0.01) and forward Corsi block span (r = 0.10, p < 0.01). Moreover, an anti-Flynn effect was found for backward digit span (r = − 0.06, p < 0.01) and for backward Corsi block span (r = − 0.17, p < 0.01). Overall, the results support co-occurrence theories that predict simultaneous secular gains in specialized abilities and declines in g. The causes of the differential trajectories are further discussed.

http://www.unz.com/jthompson/working-memory-bombshell/
https://www.newscientist.com/article/2146752-we-seem-to-be-getting-stupider-and-population-ageing-may-be-why/
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august 2017 by nhaliday
Man's Future Birthright: Essays on Science and Humanity by H. J. Muller. - Reviewed by Theodosius Dobzhansky
Hermann J. Muller (1890-1967) was not only a great geneticist but a visionary full of messianic zeal, profoundly concerned about directing the evolutionary course of mankind toward what he believed a better future.
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july 2017 by nhaliday
Dadly adaptations | West Hunter
If we understood how this works, we might find that individuals and populations vary in their propensity to show paternal care ( for genetic reasons). I would guess that paternal care was ancestral in modern humans, but it’s easy enough to lose something like this when selective pressures no longer favor it. Wolves have paternal care, but dogs have lost it.

This could have something to do with better health in married men. High testosterone levels aren’t cost-free.

It’s possible that various modern environmental factors interfere with the triggers for dadliness. That would hardly be surprising, since we don’t really know how they work.

All this has a number of interesting social implications. Let’s see how many of them you guys can spot.

Poles in the Tent: https://westhunt.wordpress.com/2013/07/09/poles-in-the-tent/
I’m considering a different question: what was the impact of men’s contribution on their children’s survival and fitness? That’s not quite the same as the number of calories contributed. Food is not a single undifferentiated quantity: it’s a category, including a number of different kinds that can’t be freely substituted for each other. Proteins, fats, and carbohydrates can all serve as fuel, but you need protein to build tissue. And amino acids, the building blocks of proteins, are not all fungible. Some we can’t synthesize (essential amino acids) others can only be synthesized from a limited set of precursors, etc. Edible plants often have suboptimal mixes of amino acids ( too many Qs, not enough Us) , but I’ve never heard of this being a problem with meat. Then you have to consider essential fatty acids, vitamins, and trace elements.

In principle, if high-quality protein were the long pole in the tent, male provisioning of meat, which we see in chimpanzees, might matter quite a bit more than you would think from the number of calories alone. I’m not say that is necessarily the case, but it might be, and it’s worth checking out.

Sexual selection vs job specialization: https://westhunt.wordpress.com/2017/10/02/sexual-selection-vs-job-specialization/
Pretty much every species is subject to sexual selection: heritable characteristics that lead to more mates or better mates can be favored by natural selection. Typically, sexual selection favors different strategies in males and females. Generally, males can gain fitness with increased mating opportunities, while females gain more from high-quality mates or mates that confer resources. Since the variance in reproduction is usually greater in males than females, sexual selection is usually stronger in males, although it exists and is significant in both sexes.

Usually, though, males and females of a given species have very similar ways of making a living. A male deer and a female deer both eat grass or arugula or whatever. Sexual selection may drive them to evolve in different directions, but finding something to eat mostly drives them in the same direction.

Humans are an exception. In the long past, men hunted and women gathered. The mix varied: in Arctic regions, men produce almost all the food (while women made and repaired gear, as well as raising children). In groups like the Bushmen, women produced most of the calories, but done rightly you would count more than calories: if most of the local plants had low protein or low-quality protein (wrong amino acid mix), meat from hunting could be important out of proportion to its caloric value.

This has been going for a long time, so there must have been selection for traits that aided provisioning ability in each sex. Those job-related selective pressures probably changed with time. For example, male strength may have become less valuable when the Bushmen developed poison arrows.

I was looking for an intelligent discussion of this question – but I ran into this and couldn’t force myself to read further: ” It should not simply be assumed that the exclusion of women from hunting rests upon “natural” physiological differences. ”

God give me strength.

https://westhunt.wordpress.com/2017/10/02/sexual-selection-vs-job-specialization/#comment-96323
What does Greg think about the “plows vs hoes” theory? (As seen here, although Sarah Constantin didn’t invent it.)

The claim is that some societies adopted farming (Europe, the Middle East, Asia) while some societies adopted horticulture (Oceana, sub-Saharan Africa, various primitive peoples) and that this had an affect on gender relations.

Basically: farming is backbreaking work, which favours males, giving them a lot of social capital. You end up with a patriarchal kind of society, where the men do stuff and the women are mostly valuable for raising offspring.

...

It’s kinda true, in places. There is a connection I haven’t seen explicated: the ‘hoe culture” has to have some factor keeping population density low, so that labor is scarcer than land. Tropical diseases like malaria might be part of that. Then again, crops like yams don’t store well, better to keep them in the ground until eating. That means it’s hard to tax people – easy with grain bins. No taxes -> no State – > high local violence. At times, VD may also help limit density, cf Africa’s ‘sterility belt’.

I am not a Moron: https://westhunt.wordpress.com/2017/11/03/i-am-not-a-moron/
So said Augustin Fuentes on Twitter, a few days ago. He’s the same guy that said “Genes don’t do anything by themselves; epigenetics and complex metabolic and developmental systems are at play in how bodies work. The roundworm C. elegans has about 20,000 genes while humans have about 23,000 genes, yet it is pretty obvious that humans are more than 15-percent more complex than roundworms. So while genes matter, they are only a small part of the whole evolutionary picture. Focusing just on DNA won’t get you anywhere.”

Fuentes was claiming that we don’t really know that, back in prehistory, men did most of the hunting while women gathered.

...

Someone (Will@Evolving _Moloch) criticized this as a good candidate for the most misleading paragraph ever written. The folly of youth! When you’ve been around as long as I have, sonny, you will realize how hard it is to set records for stupidity.

Fuente’s para is multidimensional crap, of course. People used to hunt animals like red deer, or bison, or eland: sometimes mammoths or rhinos. Big animals. Back in the day, our ancestors used stabbing spears, which go back at least half a million years. Stand-off weapons like atlatls, or bows, or JSOW, are relatively recent. Hunters took big risks & suffered frequent injuries. Men are almost twice as strong as women, particularly in upper-body strength, which is what matters in spear-chucking. They’re also faster, which can be very important which your ambush fails.
So men did the hunting. This isn’t complicated.

Which contemporary hunter-gather societies followed this pattern, had men do almost all of the big-game hunting? All of them.

...

Look, feminists aren’t happy with human nature, the one that actually exists and is the product of long-term evolutionary pressures. Too bad for them. When they say stuff like “It should not simply be assumed that the exclusion of women from hunting rests upon “natural” physiological differences. “, they just sound like fools.. ‘natural physiological differences” exist. They’re as obvious a punch in the kisser.

Suppose you wanted to construct a society with effective sexual equality – which is probably just a mistake, but suppose it. The most effective approach would surely entail knowing and taking into account how the world actually ticks. You’d be better off understanding that about 6,000 genes (out of 20,000) show significant expression differences between the sexes, than by pretending that we’re all the same. You would to make it so: by hook or by crook, by state force and genetic engineering.

Similarly, if you want to minimize war, pretending that people aren’t warlike is a poor start – about as sensible as fighting forest fires by pretending that trees aren’t flammable.

My advice to Augustin Fuentes, about not being a moron: show, don’t tell.

https://westhunt.wordpress.com/2017/11/03/i-am-not-a-moron/#comment-97721
Since DNA is the enduring part, the part that gets transmitted from one generation to the next, the part that contains the instructions/program that determine development and specify everything – he’s wrong. Stupid, like you. Well, to be fair, ignorant as well: there are technical aspects of genetics that Agustin Fuentes is unlikely to know anything about, things that are almost never covered in the typical education of an anthropologist. I doubt if he knows what a Fisher wave is, or anything about selfish genetic elements, or coalescent theory, or for that matter the breeder’s equation.

There are a number of complex technical subjects, things that at least some people understand: those people can do stuff that the man in the street can’t. In most cases, amateurs don’t jump in and pretend to know what’s going on. For example you don’t hear much concerning amateur opinions concerning detonation physics or group theory. But they’re happy to have opinions about natural selection, even though they know fuck-all about it.

https://twitter.com/FinchesofDarwin/status/922924692389818368
https://archive.is/AcBgh
"Significantly fewer females are present at hunts than males...females tend to appear at the hunting site once the capture has been made..."

“Women in Tech”: https://bloodyshovel.wordpress.com/2017/10/26/women-in-tech/
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june 2017 by nhaliday
Is soy good or bad for me? | Examine.com
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3076650/
The estimated per capita consumption of soybean oil increased >1000-fold from 1909 to 1999.
https://twitter.com/evolutionarypsy/status/892489043446988800 (increase started during 60s)

Clinical studies show no effects of soy protein or isoflavones on reproductive hormones in men: results of a meta-analysis: https://www.ncbi.nlm.nih.gov/pubmed/19524224
No significant effects of soy protein or isoflavone intake on T, SHBG, free T, or FAI were detected regardless of statistical model.

https://www.ncbi.nlm.nih.gov/pmc/?term=soy+phytoestrogen+men
some good ones:
pros and cons: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3074428/
reproductive consequences: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3443604/
visuospatial memory: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC64558/
reject (in humans)t: https://www.ncbi.nlm.nih.gov/pubmed/19524224

https://discourse.soylent.com/t/soy-in-soylent-2-0/22826/

https://well.blogs.nytimes.com/2013/09/27/ask-well-is-it-safe-to-eat-soy/
A: yes
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may 2017 by nhaliday
Secular decline in testosterone levels - Rogue Health and Fitness
A Population-Level Decline in Serum Testosterone Levels in American Men: http://sci-hub.tw/10.1210/jc.2006-1375
Secular trends in sex hormones and fractures in men and women: http://www.eje-online.org/content/166/5/887.full.pdf
https://twitter.com/toad_spotted/status/984543033285898246
https://archive.is/dcruu
Small n and older sample, but interesting that while testosterone decreases have been large for men they’ve been even larger (in % terms) for women; wonder if this contributes to declining pregnancy and sexual frequency, rising depression.

https://www.labcorp.com/assets/11476
http://www.theamericanconservative.com/articles/sperm-killers-and-rising-male-infertility/
https://www.theguardian.com/lifeandstyle/2017/jul/25/sperm-counts-among-western-men-have-halved-in-last-40-years-study
https://www.weforum.org/agenda/2017/08/most-men-in-the-us-and-europe-could-be-infertile-by-2060
Strangelove: https://youtu.be/N1KvgtEnABY?t=67

https://www.scientificamerican.com/article/sperm-count-dropping-in-western-world/
https://news.ycombinator.com/item?id=14855796
https://news.ycombinator.com/item?id=14857588
People offering human-centric explanations like cell phones: Note also that the sperm quality of dogs has decreased 30% since 1988.

mendelian rand.:
https://www.ncbi.nlm.nih.gov/pubmed/28448539
1 SD genetically instrumented increase in BMI was associated with a 0.25 SD decrease in serum testosterone
https://twitter.com/SilverVVulpes/status/857902555489341441

Ibuprofen linked to male infertility: study: https://nypost.com/2018/01/08/ibuprofen-linked-to-male-infertility-study/
http://www.pnas.org/content/115/4/E715.full

Tucker Carlson: "Men Seem To Be Becoming Less Male": https://www.realclearpolitics.com/video/2018/03/08/tucker_carlson_men_seem_to_be_becoming_less_male.html
Carlson interviewed Dr. Jordan Peterson who blamed the "insidious" movement being driven by the "radical left" that teaches there a problem of "toxic masculinity." He said ideological policies focus on "de-emphasizing masculinity may be part of the problem."

...

Those are the numbers. They paint a very clear picture: American men are failing, in body, mind and spirit. This is a crisis. Yet our leaders pretend it’s not happening. They tell us the opposite is true: Women are victims, men are oppressors. To question that assumption is to risk punishment. Even as women far outpace men in higher education, virtually every college campus supports a women’s studies department, whose core goal is to attack male power. Our politicians and business leaders internalize and amplify that message. Men are privileged. Women are oppressed. Hire and promote and reward accordingly.

https://pinboard.in/u:nhaliday/b:bd7b0a50d741
But it also hints at an almost opposite take: average testosterone levels have been falling for decades, so at this point these businessmen would be the only “normal” (by 1950s standards) men out there, and everyone else would be unprecedently risk-averse and boring.
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may 2017 by nhaliday
Environmental Cancer? | In the Pipeline
And while I take the point that endocrine disruptors and the like need to be watched (and that we really do need to study these things more), I don’t see why the alarm bells need to be rung quite this loudly.
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may 2017 by nhaliday
Reversal of the Gender Gap in Education, Motherhood, and Women as Main Earners in Europe | European Sociological Review | Oxford Academic
The Reversal of the Gender Gap in Education and
Female Breadwinners in Europe: http://www.familiesandsocieties.eu/wp-content/uploads/2015/01/WP26KlesmentVanBavel.pdf

A Record Share of Men Are “Marrying Up” Educationally: https://ifstudies.org/blog/a-record-share-of-men-are-marrying-up-educationally
Even though overall, wives have more education than their spouses today, men are still the primary provider in a majority of marriages. In 2015, more than 7-in-10 married men (73%) had a higher income than their spouse, although the share was down from 91% in 1960. During the same period, the share of married women who out-earned their spouses rose from 6% to 25%.

A Gender Reversal On Career Aspirations: http://www.pewsocialtrends.org/2012/04/19/a-gender-reversal-on-career-aspirations/
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april 2017 by nhaliday
Epidemiology of autism - Wikipedia
https://spectrumnews.org/news/school-survey-india-reveals-low-autism-prevalence/
This Is How Much of Autism Is Genetic: http://time.com/4956316/how-much-of-autism-is-genetic/
Indeed, when Sandin tracked autism diagnoses over time among the sibling pairs, he found that genetics likely accounts for around 83% of the disorder. That compares to nearly 90% reported in previous studies of twins only. Using the new model, environmental factors probably contribute around 17% to the risk of developing autism.
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march 2017 by nhaliday

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