Antarctic ice melt could disrupt the world’s oceans

David Fogarty in The Straits Times:

A major ocean circulation that forms around Antarctica could be headed for collapse, risking significant changes to the world’s weather, sea levels and the health of marine ecosystems, scientists say, offering a stark warning about the growing impacts of climate change.

Global warming is accelerating the melting of ice in Antarctica, and the increased amount of fresh water flooding into the ocean is disrupting the flow of the Antarctic overturning circulation, according to a study published on Wednesday in the journal Nature.

The Antarctic overturning circulation is part of a global network of currents that shift heat, oxygen and nutrients around the globe.

More here.



Thursday Poem

After the Election: A Father Speaks to His Son

He says, they will not take us.
They want the ones who love
another god, the ones whose
joy comes with five prayers and
songs to the sun in the mornings
and at night. He says, they will
not want us. They want the ones
whose tongues stumble over
silent e’s, whose voices creak
when a th suddenly appears
in the middle of a word.

They want the ones who cannot hide
copper skin like we can. He says,
I am old. I lived through one revolution.
We can hide our skin.
We have read the books.
He says, we are the quiet kind, the ones
who stay late and do not speak,
the ones who do not bring trumpets
or trouble. He says, we are safe in silence.
We must become ghosts.

I think, so many are already dust.
tried to stay thin, be small, tried
breaking bone and voice, tried
to be soft. So many tried to be
empty, to be barely breath. To be
still enough to be left alone. Become
shadows, trying not to be bodies.

It never works. To become nothing.
They come for the shadows, too.

by M. Soledad Caballero
from
Split This Rock

Pathogenesis – in sickness and in health

Steven Poole in The Guardian:

The Covid-19 pandemic has wreaked extraordinary destruction and misery, killing nearly 7 million people worldwide thus far and devastating the lives of many more. And yet, viewed through the long lens of human history, writes the public health sociologist Jonathan Kennedy, “there is little about it that is new or remarkable”. Previous pandemics have killed many more, both in absolute numbers and as proportions of populations, and so may future ones. Covid should be a wakeup call that helps us manage deadlier plagues in the future. But will we heed it?

Our very existence and success as a species, Kennedy argues in this fascinating book, has been shaped by bacteria and viruses. Where, for example, did all the other species of humans go? At one time, early Homo sapiens shared the Earth (and interbred with) the stronger, larger-brained and equally artistic Neanderthals, as well as the hobbit-like Denisovans. What happened to them? It could be, as some argue, that we simply killed them all, or that they were somehow less well able to adapt to climate change. But Kennedy explores the possibility that roving Homo sapiens from Africa, who had acquired strong immune systems on their travels, might have simply infected the already settled Neanderthals of Europe with a novel pathogen that they couldn’t fight off – just as the colonising Spanish, tens of thousands of years later, decimated the Aztec population with smallpox as much as with weapons.

More here.

How air pollution causes lung cancer — without harming DNA

Heidi Ledford in Nature:

Air pollution could cause lung cancer not by mutating DNA, but by creating an inflamed environment that encourages proliferation of cells with existing cancer-driving mutations, according to a sweeping study of human health data and experiments in laboratory mice. The results, published in Nature on 5 April1, provide a mechanism that could apply to other cancers caused by environmental exposure — and might one day lead to ways to prevent them. “The idea is that exposures to carcinogens could promote cancer without actually doing anything to the DNA,” says Serena Nik-Zainal, a medical geneticist at the University of Cambridge, UK. “Not every carcinogen is a mutagen.”

Cancer-causing pollution

Air pollution causes millions of deaths worldwide each year, including more than 250,000 from a type of lung cancer called adenocarcinoma. But it has been difficult to investigate how air pollution triggers cancer, in part because its effects are less pronounced than those of better-studied carcinogens such as tobacco smoke or ultraviolet light, says Nik-Zainal.

More here.

Wednesday, April 5, 2023

Country Roads and City Scenes in Japanese Woodblock Prints

S. N. Johnson-Roehr at JSTOR Daily:

A major exhibition on the art and influence of Japanese printmaker Katsushika Hokusai recently opened at the Museum of Fine Arts, Boston. Hokusai’s Great Wave is possibly the most recognized woodblock print on Earth, but as a digital collection from nearby Boston College demonstrates, many of Hokusai’s predecessors and contemporaries were skilled in the design and production of woodblock prints, or ukiyo-e, as well.

Ukiyo-e translates literally as “picture(s) of the floating world.” Ukiyo, the “floating world,” was originally “a Buddhist concept of the transitory, insubstantial nature of human existence,” explains art historian Donald Jenkins. But by the Tokugawa (Edo) period (1615–1868), the phrase evoked “the pleasures of human life, especially those associated with the brothel districts and the amusement quarters, even while some remnants of its earlier connotations remained.”

more here.

The Profound Surfaces of Preston Sturges

Rachel Syme at The New Yorker:

Klawans, like many before him, notes the echoes of Sturges’s life in his work: the juxtaposition of bohemians and stern squares, the fluency in both American vernacular and European argot, the linking of slapstick and hypocrisy. But he also wants to make this reading “wobble a bit,” and he peers between every snappy line for cultural references, Biblical allegories, political sympathies, and philosophies about love and suffering. A Sturges film, Klawans believes, is more than just its witty banter: “One of the chief distractions from thinking your way through the films is their most universally admired trait: the dialogue.”

This is a compelling idea, but it misses what makes Sturges’s films so fascinating. His rat-a-tat scripts aren’t running cover for some hidden meaning; they are the meaning. His characters make sense because they slip the yoke of explanation.

more here.

On Will Bunch’s “After the Ivory Tower Falls”

Johann N. Neem in the Los Angeles Review of Books:

Talk-show host Rush Limbaugh, recipient of the Presidential Medal of Freedom under former president Donald Trump, relied on his listeners’ resentment of college-educated folks throughout the 1990s to stoke the fires of culture war. There was something about what colleges did that convinced many of Limbaugh’s listeners that, in journalist Will Bunch’s words, “nothing in America made sense anymore.” And it was this confusion, Bunch argues in his new book, After the Ivory Tower Falls: How College Broke the American Dream and Blew Up Our Politicsand How to Fix It, that produced the biggest divide in American politics, between those with and without college degrees. Rather than dismiss the concerns of Limbaugh’s listeners, Bunch takes them seriously. They are not wrong to sense that “the American way of college went off the rails,” Bunch concludes.

More here.

A Potential Triumph in Physics, Dogged by Accusation and Doubt

Kit Chapman in Undark:

Within the past decade, scientists have discovered a class of materials that, at extreme pressures, show superconductivity at temperatures just a few tens of degrees below freezing, but the goal of a room-temperature superconductor has remained out of reach. In a paper published in the journal Nature on March 8, Dias and his colleagues reported they’d found a material, known as a lutetium hydride, that under high pressures can be superconducting at temperatures as high as 21 degrees Celsius, or nearly 70 degrees Fahrenheit — a discovery that many physicists describe as worthy of a Nobel Prize, if true.

But the physics community has been here with Dias before. In 2020, a similarly bold claim from Dias — of a material that became superconducting at around 15 degrees Celsius (59 Fahrenheit) — unleashed a torrent of critiques and accusations, ultimately leading to the paper’s retraction last fall. Dias’ fiercest critics say that he has committed research misconduct, possibly on more than one occasion, and that he has yet to be held fully accountable.

More here.

David Hume’s Guide to Today’s Politics

Alan Jacobs in The Hedgehog Review:

Recently, I argued in this publication that one of our best guides to the world of social media is David Hume—but Hume helps us to understand other elements of our current political culture as well.

Take, for instance, Hume’s contention, in a famous essay, that the two primary “corruptions of true religion” are superstition and enthusiasm. He was thinking primarily of Roman Catholics on the one hand and, on the other, a variety of Protestant religious groups that today we might see as examples or forerunners of evangelicalism; but he deliberately frames his argument in more general terms, as though describing not distinct factions of his time but rather enduring dispositions. “The true sources of superstition,” he argues, are “weakness, fear, melancholy, together with ignorance.” The true sources of enthusiasm, by contrast, are “hope, pride, presumption, a warm imagination, together with ignorance.” You will note that the only item common to both sides is ignorance. A typical Hume comment.

I want to argue that the primary social forces disrupting American society today are modern versions of these two false religions. Our current version of superstition is the MAGA belief system. Our current version of enthusiasm is what some people call wokeness but I prefer to call Left Purity Culture (LPC).

More here.

The big idea: will fusion power save us from the climate crisis?

Philip Ball in The Guardian:

There are plenty of uncertainties and unknowns around fusion energy, but on this question we can be clear. Since what we do about carbon emissions in the next two or three decades is likely to determine whether the planet gets just uncomfortably or catastrophically warmer by the end of the century, then the answer is no: fusion won’t come to our rescue. But if we can somehow scramble through the coming decades with makeshift ways of keeping a lid on global heating, there’s good reason to think that in the second half of the century fusion power plants will gradually help rebalance the energy economy.

Perhaps it’s this wish for a quick fix that drives some of the hype with which advances in fusion science and technology are plagued. Take the announcement last December of a “major breakthrough” by the National Ignition Facility (NIF) of the Lawrence Livermore National Laboratory in California. The NIF team reported that, in their efforts to develop a somewhat unorthodox form of fusion called inertial confinement fusion (ICF), they had produced more energy in their reaction chamber than they had put in to get the fusion process under way.

More here.

How a DNA ‘Parasite’ May Have Fragmented Our Genes

Jake Buehler in Quanta Magazine:

All animals, plants, fungi and protists — which collectively make up the domain of life called eukaryotes — have genomes with a peculiar feature that has puzzled researchers for almost half a century: Their genes are fragmented.

In their DNA, the information about how to make proteins isn’t laid out in long coherent strings of bases. Instead, genes are split into segments, with intervening sequences, or “introns,” spacing out the exons that encode bits of the protein. When eukaryotes express their genes, their cells have to splice out RNA from the introns and stitch together RNA from the exons to reconstruct the recipes for their proteins.

The mystery of why eukaryotes rely on this baroque system deepened with the discovery that the different branches of the eukaryotic family tree varied widely in the abundance of their introns. The genes of yeast, for instance, have very few introns, but those of land plants have many. Introns make up almost 25% of human DNA. How this tremendous, enigmatic variation in intron frequency evolved has stirred debate among scientists for decades.

More here.

Tuesday, April 4, 2023

Postcards from Absurdistan: Prague at the End of History

Alena Dvořáková at the Dublin Review of Books:

Postcards from Absurdistan is the third volume in a ‘loose trilogy of cultural histories’ in which Derek Sayer has argued that European modernity is best examined from a vantage point located, both literally and figuratively, in Bohemia and its capital, Prague. The first volume, The Coasts of Bohemia (1998), tackled the issue of national identity. It presented Czech history – from its mythic beginnings to just after the communist takeover in 1948 – as a lesson on the nature of national historiography. When a ‘small’ nation has, for most of its past, struggled for recognition, its history is bound to consist of attempts to re-invent the past in order to assure itself of a future. The form of this reassurance: a bricolage of national treasures assembled largely under the motto ‘small but ours’. Focusing on the main tropes of the Czech National Revival – especially the emphasis on the Czech language as the basis for national identity, and the encoding of Czechness as something anti-German, anti-aristocratic and anti-Catholic – Sayer presents this chequered history as a corrective to the national histories of bigger, older, more secure nations. A lot of what he marks out as specifically Czech, however, sounds very familiar in the Irish context. None better than the Czechs at understanding Irish people’s fondness for the ‘best little country in the world’ trope (including its associated ironies) and the pitfalls of turning a language into a crux of nationality.

more here.

On Mary Wollstonecraft

Joanna Biggs at The Paris Review:

A Vindication was written in six weeks. On January 3, 1792, the day she gave the last sheet to the printer, Wollstonecraft wrote to Roscoe: “I am dissatisfied with myself for not having done justice to the subject.—Do not suspect me of false modesty—I mean to say that had I allowed myself more time I could have written a better book, in every sense of the word.” Wollstonecraft isn’t in fact being coy: her book isn’t well-made. Her main arguments about education are at the back, the middle is a sarcastic roasting of male conduct-book writers in the style of her attack on Burke, and the parts about marriage and friendship are scattered throughout when they would have more impact in one place. There is a moralizing, bossy tone, noticeably when Wollstonecraft writes about the sorts of women she doesn’t like (flirts and rich women: take a deep breath). It ends with a plea to men, in a faux-religious style that doesn’t play to her strengths as a writer. In this, her book is like many landmark feminist books—The Second Sex, The Feminine Mystique—that are part essay, part argument, part memoir, held together by some force, it seems, that is attributable solely to its writer. It’s as if these books, to be written at all, have to be brought into being by autodidacts who don’t know for sure what they’re doing—just that they have to do it.

more here.

The Beatles and the Glory of Creative Risk

Vincent Ercolano in The Hedgehog Review:

Perhaps it took the roiling events that would give such a manic-depressive quality to 1963––the death in early June of Pope John XXIII (and with it, some feared, the demise of John’s policy of aggiornamento, “updating”); the signing of the Nuclear Test Ban Treaty in August; the March on Washington the same month; and, in cruel culmination of the year’s roller-coaster ride, the assassination of President Kennedy on November 22––to open the ears (and hearts) of the American public, by year’s end emotionally spent, to the cheeky wit and fresh take on rock ‘n’ roll offered by the Beatles. As Rorem would observe, “Our need for [the Beatles] is…specifically a renewal, a renewal of pleasure.”

While Beatles fans continually renew the pleasure of listening to Please Please Me, whether on smartphones, CDs, or once-again-popular vinyl, perhaps the premier accomplishment of Lennon, McCartney, Harrison, and Starr was the rocket-like trajectory described by their music in the four years from that first album to the arrival in 1967 of the emotionally complex and musically audacious Sgt. Pepper’s Lonely Hearts Club Band…

More here.

Cracking the creation of life: An exclusive interview with biochemist Nick Lane

Omari Edwards at IAI News:

Thanks so much for speaking to us Nick, I wanted to start off by asking about the philosophical principles you use in the lab every day. Philosophers often see science as proposing a reductive theory of the world, breaking it down into its constituent parts. Some worry that this ignores the complexity of life. Do you think that this reduction plays a role in your work and science more broadly?

I have to say that reductionism plays a rather ambiguous role in my work, and I think in the work of most scientists. Of course, there are some necessities about the scientific method which mean that the only way we can answer certain questions is by reducing a problem to its fundamentals. However, I think this misses out on what scientists are really doing. We aren’t trying to just give a reductive account we are always working within a framework. And that framework is going to be synthetic.

More here.