Menstrual synchrony was first demonstrated in a 1971 paper published in Nature by Martha McClintock. […]

she asked 135 college girls living in dorms to recall their period start dates at three times throughout the academic year. She found that close-friend groups had periods significantly closer together in April (later in the year) compared with October: lessening from an average of 6.4 to 4.6 days apart.

The phenomenon was dubbed “the McClintock effect” and is widely held as the first example of pheromones — unconscious chemical signals that influence behavior and physiology — among humans. […] Many subsequent researchers went on to reproduce the results from McClintock’s original experiment in people, rats, hamsters and chimpanzees.

But a cohort of studies that found no evidence for menstrual synchrony began to grow, too. […]

In 1992 H. Clyde Wilson […] re-analyzed McClintock’s first experiment, along with a few others that used a similar design. He found that all had inflated the difference between period start dates at the beginning of their studies […] their model of two pheromones — one that pulls ovulation forward and one that delays it — driving synchrony didn’t work […]

The insurmountable hurdle in all the studies is that women often have persistent cycles of different lengths. As such, they can never truly synchronize, just randomly phase in and out of synchrony over the months as their cycles diverge and converge. […]

But a team of Japanese researchers at Yokohama City University, led by Kazuyuki Shinohara, also found in a series of papers that donor women undergoing these two phases of the menstrual cycle release compounds that when inhaled by other women can significantly impact the frequency in the latter of pulses of luteinizing hormone (LH), which helps control the timing of ovulation and cycle length.

{ Scientific American | Continue reading }

In the late 1940s, the British magician David Berglas started refining a trick that came to be known as “the holy grail of card magic.” […] The trick is a version of a classic plot of magic, called Any Card at Any Number. These tricks are called ACAAN in the business.

ACAAN has been around since the 1700s, and every iteration unfolds in roughly the same way: A spectator is asked to name any card in a deck — let’s say the nine of clubs. Another is asked to name any number between one and 52 — let’s say 31.

The cards are dealt face up, one by one. The 31st card revealed is, of course, the nine of clubs. Cue the gasps.

There are hundreds of ACAAN variations, and you’d be hard pressed to find a professional card magician without at least one in his or her repertoire. (A Buddha-like maestro in Spain, Dani DaOrtiz, knows about 60.) There are ACAANs in which the card-choosing spectator writes down the named card in secrecy; ACAANs in which the spectator shuffles the deck; ACAANs in which every other card turns out to be blank.

For all their differences, every ACAAN has one feature in common: At some point, the magician touches the cards. The touch might be imperceptible, it might appear entirely innocent. But the cards are always touched.

With one exception: David Berglas’s ACAAN. He would place the cards on a table and he didn’t handle them again until after the revelation and during the applause.

{ NY Times | Continue reading }

synthetic polymer and silkscreen ink on canvas { Andy Warhol, Are You “Different?” (Positive), 1985 }

Let’s start with the Navy cases. Some of the pilots have told of seeing flying objects shaped like Tic Tacs or other unusual forms. The recordings from the planes’ cameras show amorphous shapes moving in surprising ways, including appearing to skim the ocean’s surface and then disappear beneath it. This might appear to be evidence of extraterrestrial technology that can defy the laws of physics as we understand them — but in reality it doesn’t amount to much.

For one thing, first-person accounts, which are notoriously inaccurate to begin with, don’t provide enough information for an empirical investigation. Scientists can’t accurately gauge distances or velocity from a pilot’s testimony: “It looked close” or “It was moving really fast” is too vague. What a scientist needs are precise measurements from multiple viewpoints provided by devices that register various wavelengths (visual, infrared, radar). That kind of data might tell us if an object’s motion required engines or materials that we Earthlings don’t possess.

Perhaps the videos offer that kind of data? Sadly, no. While some researchers have used the footage to make simple estimates of the accelerations and other flight characteristics of the U.F.O.s, the results have been mixed at best. Skeptics have already shown that some of the motions seen in the videos (like the ocean skimming) may be artifacts of the cameras’ optics and tracking systems.

There are also common-sense objections. If we are being frequently visited by aliens, why don’t they just land on the White House lawn and announce themselves? There is a recurring narrative, perhaps best exemplified by the TV show “The X-Files,” that these creatures have some mysterious reason to remain hidden from us. But if the mission of these aliens calls for stealth, they seem surprisingly incompetent. You would think that creatures technologically capable of traversing the mind-boggling distances between the stars would also know how to turn off their high beams at night and to elude our primitive infrared cameras.

{ Adam Frank/NY Times | Continue reading }

encaustic on newspaper and cloth over canvas { Jasper Johns, Green Target, 1955 }

For some Navy pilots, UFO sightings were an ordinary event: ‘Every day for at least a couple years’

‘Sightings all over the world’

Between the 1970s and the early aughts, the incidence of myopia in the US nearly doubled, to 42 percent. Myopia’s rise has been the starkest in Asia; one survey in Korea found a rate as high as 96 percent among teenagers.

Clearly, something is going on. But scientists can’t agree on exactly what. Being constantly tethered to devices and books indoors might be part of it: Based on a handful of large epidemiological studies on myopia, spending time outdoors—especially in early childhood—reduces the onset of myopia. […]

Neuroscientists discovered the classic animal model for myopia by accident in the 1970s, when they were sewing one eye shut in newborn monkeys to study the development of the brain’s visual system. […] Around the same time as the eye-sewing experiments, neuroscientists figured out they could do the same in chickens and tree shrews—much easier to keep in the lab than monkeys. And instead of sewing the eyelid shut, they could just put what looks like half a ping pong ball over the eye. This “form deprivation” model of myopia has inspired some fascinating science. In 2010, for example, Morgan’s collaborators found that exposure to bright light could reverse this type of induced myopia in chickens. Further experiments pinned down the mechanism, too: Light activates the neurotransmitter dopamine, which prevents the eyes from growing longer.

{ Wired | Continue reading }

The Narrative of Arthur Gordon Pym of Nantucket (1838) is the only complete novel written by American writer Edgar Allan Poe. […] The story starts out as a fairly conventional adventure at sea, but it becomes increasingly strange and hard to classify. […]

Peters, Pym, and Augustus hatch a plan to seize control of the ship […] soon the three men are masters of the Grampus: all the mutineers are killed or thrown overboard except one, Richard Parker, whom they spare to help them run the vessel. […] As time passes, with no sign of land or other ships, Parker suggests that one of them should be killed as food for the others. They draw straws, following the custom of the sea, and Parker is sacrificed.

{ Wikipedia | Continue reading }

On 19 May 1884 four men set sail from Southampton in a small yacht. They were professional sailors tasked with taking their vessel, the Mignonette, to its new owner in Australia. […] The Mignonette’s captain, Tom Dudley, was 31 years old and a proven yachtsman. Of his crew, Ned Brooks and mate Edwin Stephens were likewise seasoned sailors. The final crew-member, cabin boy Richard Parker, was just 17 years old and making his first voyage on the open sea. […]

On 5 July, sailing from Madeira to Cape Town, the Mignonette was sunk by a giant wave. […] Adrift in an open boat in the South Atlantic, hundreds of miles from land, they had little in the way of provisions. They had no water, and for food, only two 1lb tins of turnips grabbed during the Mignonette’s final moments.

Over the next 12 days, these turnips were scrupulously rationed out […] For water […] they resorted to drinking their own urine, although this too was a diminishing resource as their bodies became increasingly dehydrated.

By 17 July all supplies on board the little dinghy had been exhausted. After a further three days, the inexperienced Richard Parker could not resist gulping down sea water in an attempt to allay his thirst. It is now known that small quantities of sea water can help to sustain life in survival situations, but in that period it was widely believed to be fatal. Parker also drank far in excess of modern recommendations and he was soon violently unwell, collapsing in the bottom of the boat with diarrhea.

Even before Parker fell ill, Tom Dudley had broached the fearful topic of the “custom of the sea,” the practice of drawing lots to select a sacrificial victim who could be consumed by his crew-mates. […] According to their subsequent depositions, however, no lots were drawn. Instead, Dudley told Stephens to hold Parker’s legs should he struggle, before kneeling and thrusting his penknife into the boy’s jugular. […] Parker’s body was then stripped and butchered. The heart and liver were eaten immediately; strips of flesh were cut from his limbs and set aside as future rations. What remained of the young man was heaved overboard.

{ History Extra | Continue reading }

Female 29 years of age, university student, from dysfunctional family. She began her suffering 11 years ago with personality dissociation, characterized by aversion to sacred objects and images, and psychomotor agitation with transient states of loss of consciousness with manifestations of spiritual possession that required psychiatric, and psychological treatment, and 5 exorcisms without improvement over a period of ten years. […]

With informed consent, a fMRI was accomplished before and in the beginning of a possession induced by exorcism performed by a Catholic priest. […] due to the involuntary motor activity and the patient’s loss of consciousness, it is not possible to perform the analysis completely in this case.

{ Trends in Medicine | Continue reading }

There were 16 people in total that participated in the project “Resting Stated-Tractography-fMRI in initial phase of spiritual possession.” 13 of them are health professionals: a surgeon, psychiatrist, psychologist, neurophysiologist, family medicine physician, neurosurgeon, 2 radiology technicians, a gynecologist, medical doctor, diagnostic radiology physician, exorcist and patient (Ex former medical student). The priest, mother and an aunt of the patient were not included. […]

8 out of 13 participants (61.53%) had accidents and sudden events that put their lives in danger […]

Eight days before the exorcism, the psychiatrist experienced malfunctioning of his computer […]

Seven days after the exorcism, the surgeon had a head trauma, chest trauma and multiple bruises in a forest accident with fall from a height of one meter; he also had a MVA (motor vehicle accident) 15 minutes before receiving the images of the patient’s tractografies […]

22 days after the exorcism the medical doctor presented sudden breakup of a ten years relationship with her boyfriend.

Eight days before and during the exorcism, the father of the patient (a family medicine physician) presented chest and back pain with a normal electrocardiogram; 37 days after the exorcism he is admitted to the Critical Care Unit “CCU” for massive acute myocardial infarction, with loss of myocardial function of 90%.

41 days after the exorcism, the gynecologist is involved in an offense she did not commit.

[…]

On the survey carried out, the 12 participants are much more afraid of organized crime in Mexico than of the devil.

{ Trends in Medicine | PDF }

{ Aron Klein, Bulgarian demon chasers | more }

For the second time ever, astronomers have detected a pattern in a mysterious fast radio burst coming from space. […] earlier this year when astronomers found that FRB 180916.J0158+65 had a pattern in bursts occurring every 16.35 days. Over the course of four days, the signal would release a burst or two each hour. Then, it would go silent for another 12 days.

Now, they have detected a pattern in a second repeating fast radio burst, known as FRB 121102. During this cyclical pattern, radio bursts are emitted during a 90-day window, followed by a silent period of 67 days. This pattern repeats every 157 days.

{ CNN | Continue reading }

“Attitudes are more important than facts,” Peale preached.

“Formulate and stamp indelibly on your mind a mental picture of yourself as succeeding,” Peale writes in “The Power of Positive Thinking.”

“Hold this picture tenaciously. Never permit it to fade.”

[…]

Paula White, a televangelist, belongs to the Word of Faith movement, which teaches that God bestows health and wealth on true believers.

In a Rose Garden ceremony for the National Day of Prayer earlier this month, White quoted from the Bible’s Book of Job: “If you decree and declare a thing, it will be established.”

“I declare no more delays to the deliverance of Covid-19,” White continued. “No more delays to healing and a vaccination.”

{ CNN | Continue reading }

The Navy records, known as “hazard reports,” describe both visual and radar sightings, including close calls with the aerial vehicles, or “unmanned aircraft systems.”

One incident, on March 26, 2014, over the Atlantic Ocean off Virginia Beach, involved a silver object “approximately the size of a suitcase” that was tracked on radar passing within 1,000 feet of one of the jets, according to the report. […]

Defense Department officials do not describe the objects as extraterrestrial, and experts emphasize that earthly explanations can generally be found for such incidents. Even lacking a plausible terrestrial explanation does not make an extraterrestrial one likely, astrophysicists say.

{ NY Times | Continue reading }

I contacted Alexander Wendt, a professor of international relations at Ohio State University. Wendt is a giant in his field of IR theory, but in the past 15 years or so, he’s become an amateur ufologist. […] “It’s possible they’ve been here all along. And that’s something that I’ve been thinking about lately, which is a bit unsettling. Because it means it’s their planet and not ours. They could just be intergalactic tourists. Maybe they’re looking for certain minerals. It could just be scientific curiosity. It could be that they’re extracting our DNA. I mean, who knows? I have no idea. All I know is that if they are here, they seem to be peaceful. […] I think if they are here, they’ve probably been here a very long time — that’s my guess. ”

{ Vox | Continue reading }

Regarding UFOs, I see three key explanation categories:

Measurement Error – What look like artificial objects with crazy extreme abilities are actually natural stuff looked at wrong. This is widely and probably correctly judged to be the most likely scenario. Nevertheless, we can’t be very confident of that without considering its alternatives in more detail.

Secret Societies – There really are artificial objects with amazing abilities, though abilities may be somewhat overestimated via partially misleading observations. These are created and managed by hidden groups in our world, substantially tied to us. Secret local military research groups, distant secret militaries, non-state Bond-villain-like groups, time-travelers from our near future, dinosaur civilizations hidden deep in the Earth’s crust, etc.

Aliens – Again these objects really do have amazing abilities, and are created by hidden groups. But in this case the relevant groups are much less integrated with and correlated with our societies and history. Little green men, their super-robot descendants, simulation admins, gods, etc. If these groups had a common origin with, competed with, or were much influenced by the groups that we know of, those things mostly happened long ago, and probably far away.

{ Overcoming Bias | Continue reading }

photo {Ansel Adams, The Golden Gate, San Francisco, c. 1950 }

About 30% of the world’s population is possessed by ghosts. […]

The main reason behind the gay orientation of some men is that they are possessed by female ghosts.

{ Spiritual Research Foundation | Continue reading }

Intelligence and education do not protect against superstition. […] I was an astrologer – here’s how it really works, and why I had to stop.

{ The Guardian | Continue reading }

image { Fund｜Befund }

Electrical activity from the brains of a pair of human subjects was transmitted to the brain of a third individual in the form of magnetic signals, which conveyed an instruction to perform a task in a particular manner. […]

In [another] report, a human using a noninvasive brain interface linked, via computer, to the BCI of an anesthetized rat was able to move the animal’s tail.

{ Scientific American | Continue reading }

art { Barbara Stauffacher Solomon, San Francisco Museum of Art, Calendar, 1969 }

Cooping was an alleged form of electoral fraud in the United States cited in relation to the death of Edgar Allan Poe in October 1849, by which unwilling participants were forced to vote, often several times over, for a particular candidate in an election. According to several of Poe’s biographers, these innocent bystanders would be grabbed off the street by so-called ‘cooping gangs’ or ‘election gangs’ working on the payroll of a political candidate, and they would be kept in a room, called the “coop”, and given alcoholic beverages in order for them to comply. If they refused to cooperate, they would be beaten or even killed. Often their clothing would be changed to allow them to vote multiple times. Sometimes the victims would be forced to wear disguises such as wigs, fake beards or mustaches to prevent them from being recognized by voting officials at polling stations.

{ Wikipedia | Continue reading }

On October 3, 1849, Edgar Allan Poe was found delirious on the streets of Baltimore, “in great distress, and… in need of immediate assistance”, according to Joseph W. Walker who found him. He was taken to the Washington Medical College where he died on Sunday, October 7, 1849 at 5:00 in the morning. He was not coherent long enough to explain how he came to be in his dire condition and, oddly, was wearing clothes that were not his own.

He is said to have repeatedly called out the name “Reynolds” on the night before his death, though it is unclear to whom he was referring.

All medical records and documents, including Poe’s death certificate, have been lost, if they ever existed.

Newspapers at the time reported Poe’s death as “congestion of the brain” or “cerebral inflammation”, common euphemisms for death from disreputable causes such as alcoholism.

The actual cause of death remains a mystery. […] One theory dating from 1872 suggests that cooping was the cause of Poe’s death, a form of electoral fraud in which citizens were forced to vote for a particular candidate, sometimes leading to violence and even murder. […] Cooping had become the standard explanation for Poe’s death in most of his biographies for several decades, though his status in Baltimore may have made him too recognizable for this scam to have worked. […]

Immediately after Poe’s death, his literary rival Rufus Wilmot Griswold wrote a slanted high-profile obituary under a pseudonym, filled with falsehoods that cast him as a lunatic and a madman, and which described him as a person who “walked the streets, in madness or melancholy, with lips moving in indistinct curses, or with eyes upturned in passionate prayers, (never for himself, for he felt, or professed to feel, that he was already damned)”.

The long obituary appeared in the New York Tribune signed “Ludwig” on the day that Poe was buried. It was soon further published throughout the country. The piece began, “Edgar Allan Poe is dead. He died in Baltimore the day before yesterday. This announcement will startle many, but few will be grieved by it.” “Ludwig” was soon identified as Griswold, an editor, critic, and anthologist who had borne a grudge against Poe since 1842. Griswold somehow became Poe’s literary executor and attempted to destroy his enemy’s reputation after his death.

{ Wikipedia | Continue reading }

Beliefs in witches and sorcerers are disturbing and calamitous. Sterility, illness, death, rainstorms, burnt-down houses, bald spots, attacks from wild animals, lost foot races, lost reindeer races, the puzzling behavior of a friend or spouse – the enigmatic, the impactful, the bothersome – all can spark suspicions of neighbors using magic and dark powers; all can precipitate violence. The suspects are sometimes normal humans, learned in dark magic, but other times, rumored to be odious and other. They devour babies, fornicate with their menstruating mothers, and use human skulls for sports. They become bats and black panthers, house pythons in their stomachs, and direct menageries of attendant nightbirds. They plot the destruction of families and then dance in orgiastic night-fests. […]

In nearly every documented society, people believe that some misfortunes are attributable to malicious group mates employing magic or supernatural powers. Here I report cross-cultural patterns in these beliefs and propose a theory to explain them.

Using the newly-created Survey of Mystical Harm, I show that several conceptions of evil, mystical practitioners recur around the world, including sorcerers (who use learned spells), possessors of the evil eye (who transmit injury through their stares and words), and witches (who possess superpowers, pose existential threats, and engage in morally abhorrent acts).

I argue that these beliefs develop from three cultural selective processes — a selection for effective-seeming magic, a selection for plausible explanations of impactful misfortune, and a selection for demonizing myths that justify mistreatment. Separately, these selective schemes produce traditions as diverse as shamanism, conspiracy theories, and campaigns against heretics — but around the world, they jointly give rise to the odious and feared witch. […]

Societally-corrosive beliefs can persist when they are intuitively appealing or serve some believers’ agendas. […]

People are more likely to attribute injury to mystical harm when they lack alternative explanations. […]

The greater the impact of the misfortune, the more likely people are to attribute it to mystical harm.

{ SocArXiv | Continue reading }

The Beast of Gévaudan is the historical name associated with the man-eating gray wolf, dog or wolfdog that terrorized the former province of Gévaudan, in south-central France between 1764 and 1767.

The attacks, which covered an area stretching 90 by 80 kilometres (56 by 50 mi), were said to have been committed by a beast or beasts that had formidable teeth and immense tails according to contemporary eyewitnesses.

Victims were often killed by having their throats torn out. The Kingdom of France used a considerable amount of manpower and money to hunt the animals, including the resources of several nobles, soldiers, civilians, and a number of royal huntsmen.

The number of victims differs according to sources. In 1987, one study estimated there had been 210 attacks; resulting in 113 deaths and 49 injuries; 98 of the victims killed were partly eaten. However, other sources claim it killed between 60 and 100 adults and children, as well as injuring more than 30.

According to modern scholars, public hysteria at the time of the attacks contributed to widespread myths that supernatural beasts roamed Gévaudan, but deaths attributed to a beast were more likely the work of a number of wolves or packs of wolves.

{ Wikipedia | Continue reading }

The Beast preyed almost entirely on women and children living in isolated cottages and hamlets, often as they tended animals or gathered crops in open fields. Men and cattle were not to its liking. Nor, it seemed, were sheep and goats. […]

Sometimes La Bête attacked several times in one day or on successive days, often leaving the victim uneaten. Some witnesses said that it wore an armoured hide, perhaps that of a boar. One surviving victim claimed the beast walked on two legs. Several witnesses saw a man with La Bête.

{ History Today | Continue reading }

The king sent his own gun-bearer and bodyguard, François Antoine. Along with his son and a detachment of men, Antoine traipsed around the forested countryside in search of the beast. In September 1765, he shot and killed a large wolf. He had the body sent to the court at Versailles, received a reward from Louis XV, and accepted the villagers’ gratitude

Two brief months later the attacks recommenced.

For another 18 months, something continued to stalk the villagers of Gévaudan, with a reported 30 to 35 fatalities in that period. […]

Jean Chastel was a local farmer involved in a previous hunt, and thrown in prison [with his son Antoine Chastel] by François Antoine for misleading his men into a bog.

{ Smithsonian | Continue reading }

There were no killings when Jean and Antoine Chastel were in prison. The attacks resumed when they were liberated, and stopped only when Jean Chastel killed the animal.

{ Loren Coleman/FATE | Continue reading }

A 2009 investigation uncovered a potential culprit, Jean Chastel, the man said to have killed the second beast in June 1767. The investigators wondered how Chastel, a farmer, shot La Bête dead when the region’s finest wolf hunters could not. They concluded that La Bête must have been still for sometime, when Chastel shot it. It did not run from, or at, Chastel. Was La Bête tethered? Was this man its keeper?

As for motive, some have suggested that Chastel, or one of his sons, was a serial killer, and La Bête their way of covering up the crimes. Others claim that Chastel’s son had a hyena in his menagerie and a huge red mastiff that sired the monstrous offspring with a female wolf. […]

The body of the animal Chastel shot was taken to Versailles. By the time it reached the king the carcass had rotted and was ordered to be destroyed.

{ History Today | Continue reading }

Jean Chastel’s son Antoine was said to have lived as a hermit on Mount Mouchet, with a menagerie of beasts, including a hyena. Cryptozoologists have speculated that Antoine Chastel might have used this animal to attack the young boys and girls.

{ Loren Coleman/FATE | Continue reading | Note: “Fate is a U.S. magazine about paranormal phenomena” }

acrylic, oilstick and paper collage on canvas { Jean-Michel Basquia, Peter and the Wolf, 1985 }

A distant galaxy that appears completely devoid of dark matter has baffled astronomers and deepened the mystery of the universe’s most elusive substance.

The absence of dark matter from a small patch of sky might appear to be a non-problem, given that astronomers have never directly observed dark matter anywhere. However, most current theories of the universe suggest that everywhere that ordinary matter is found, dark matter ought to be lurking too, making the newly observed galaxy an odd exception. […]

Paradoxically, the authors said the discovery of a galaxy without dark matter counts as evidence that it probably does exist.

{ Guardian | Continue reading }

photo { Luc Kordas }

Why the Victorian era saw a surge in female births and war begets boys

There is empirical evidence that heavy sexual activity increases the chances that conception will occur before the most fertile time of the female cycle, as the woman may be pregnant by then. And the data also suggest that, possibly for hormonal reasons, such conceptions are slightly more likely to be boys. “It doesn’t take much imagination to suppose that the ends of wars, with servicemen home on leave or returning home, are associated with fairly intense sex – more babies were born in the UK in 1919 than any other year in history. Put all these together and you get the conclusion – frantic fornication breeds boys.”

[…]

Which brings us back to the mysterious surge of female births in the late Victorian period. Could it be that, in the same vein in which heavy sexual activity increases the sex ratio, a  trend towards sexual inactivity lowers it? “Victorian morality” distinguished itself through a set of values that espoused sexual restraint, with an increased condemnation of masturbation and sexual activity in general, repressing any form of sexuality other than penetrative intercourse. And indeed, statistics reflect a steady decline of sexual activity throughout the Victorian period, reaching its lowest point in the year 1898. But as there was less sex going on, conception tended to occur around the most fertile time of the months, bestowing a (relative) excess of baby girls on the Victorians.

{ Rolf Degen | Continue reading }

Hypothesis 1

Up to circa two decades age, it was generally supposed – but without hard supporting evidence – that pregnant women exposed to adverse environmental circumstances were at increased risk of foetal loss, and that male foetuses were at greater risk than female foetuses; and that therefore the liveborn infants produced by stressed women contained a higher proportion of daughters. That hard evidence has now been accumulated in a series of papers by Catalano and colleagues, and others.

Using time-series analysis, it has been shown that the Sex ratios at birth (SRB) briefly declined, slightly but significantly, some three to five months after many catastrophic and other adverse events e.g. the terrorist attacks on September 11th, 2001; the Troubles in Northern Ireland (1969–1998), the Breivik shooting in 2011 in Norway, the Sandy Hook shooting in 2012 in Connecticut; the assassination of President Kennedy [though the effect in this case was more marked in non-White than White births]. […]

Thus there is overwhelming evidence that sex ratios at birth are partially controlled by maternal stress-induced selective culling of frail males in utero, resulting in a conception cohort with a low sex ratio at birth. It has also been postulated that the ratio may be skewed because of fertilization of non-optimally matured oocytes under these circumstances. Moreover, it has also been hypothesized that higher coital rates will lead to ejaculation of newly formed spermatozoa cells, possibly leading to a preponderance of Y-sperm since it is also hypothesized that X-sperm age faster and are eliminated earlier.

However, it will be appreciated that selective culling of frail males during pregnancy cannot explain some of the established variations of SRB. First, it cannot explain why some reported sex ratios are higher than prevailing norms. Second, it cannot explain why these norms almost always exceed 0.5 (equal numbers of males and females).

Hypothesis 2

It has been hypothesized that human sex ratios at birth are partially controlled by the parental hormone levels of both parents around the time of conception. Ex hypothesi, high levels of testosterone (in either parent) and/or of oestrogen (in the mother), are associated with subsequent male births. And high levels of gonadotrophins (in either parent) are associated with subsequent female births. Most of this evidence is observational and correlational, and is in accordance with the hypothesis of Trivers & Willard.

{ Early Human Development | Continue reading }

lithograph { Ellsworth Kelly, Small Blue Curve, 2013 }

{ This Brooklyn Heights fake townhouse is actually a subway emergency exit }

Simulation suggests 68 percent of the universe may not actually exist

According to the Lambda Cold Dark Matter (Lambda-CDM) model, which is the current accepted standard for how the universe began and evolved, the ordinary matter we encounter every day only makes up around five percent of the universe’s density, with dark matter comprising 27 percent, and the remaining 68 percent made up of dark energy, a so-far theoretical force driving the expansion of the universe. But a new study has questioned whether dark energy exists at all, citing computer simulations that found that by accounting for the changing structure of the cosmos, the gap in the theory, which dark energy was proposed to fill, vanishes.

{ New Atlas | Continue reading }

art { Portia Munson, Her Coffin, 2016 }