Category: Science

New Guineans Bred “Pretty Tasty Bananas Without Formal Knowledge of the Principles of Inheritance and Evolution”

(p. D2) Wild bananas, or Musa acuminata, have flesh packed with seeds that render the fruit almost inedible. Scientists think bananas were domesticated more than 7,000 years ago on the island of New Guinea. Humans on the island at the time bred the plants to produce fruit without being fertilized and to be seedless. They were able to develop pretty tasty bananas without formal knowledge of the principles of inheritance and evolution.

For the full story, see:

Oliver Whang. “Fruitful Research: Yes, We Have Lots of Bananas, but Not the Ones You’re Looking For.” The New York Times (Tuesday, October 25, 2022): D2.

(Note: the online version of the story has the date Oct. 17, 2022, and has the title “The Search Is on for Mysterious Banana Ancestors.”)

DNA from Two Million Years Ago Shows Rich Forest Ecosystem in the “Remarkably Warm” Greenland Arctic

(p. A1) In the permafrost at the northern edge of Greenland, scientists have discovered the oldest known fragments of DNA, offering an extraordinary look at an extraordinary ancient ecosystem.

The genetic material dates back at least two million years — that’s nearly twice as old as the mammoth DNA in Siberia that held the previous record. And the samples, described on Wednesday in the journal Nature, came from more than 135 different species.

Together, they show that a region just 600 miles from the North Pole was once covered by a forest of poplar and birch trees inhabited by mastodons. The forests were also home to caribou and Arctic hares. And the warm coastal waters were filled with horseshoe crabs, a species that today cannot be found any farther north of Maine.

Independent experts hailed the study as a major advance.

“It feels almost magical to be able to infer such a complete picture of an ancient ecosystem from tiny fragments of preserved (p. A8) DNA,” said Beth Shapiro, a paleogeneticist at the University of California, Santa Cruz.

“I think it’s going to blow people’s minds,” said Andrew Christ, a geoscientist at the University of Vermont who studies the ancient Arctic. “It certainly did so for me.”

The discovery came after two decades of scientific gambles and frustrating setbacks.

. . .

. . . the presence of horseshoe crabs in the shallow coastal waters suggests that the ocean and land alike were remarkably warm.

Dr. Willerslev and his colleagues are continuing to study the DNA for clues to how all these species were able to thrive a thousand miles north of the Arctic Circle. The trees, for example, had to survive half the year in darkness. The DNA preserved for two million years may hold their secrets of adaptation.

The scientists are also interested in how the DNA fragments managed to survive so long and defy expectations. Their research indicates that the DNA molecules can cling to minerals of feldspar and clay, which protect them from further damage.

. . .

Dr. Christ said that finding more DNA may help them better understand how human-driven climate change will alter the Arctic. We should not assume, he said, that the region will resemble ecosystems in places farther south. After all, the ecosystem of Kap Kobenhavn two million years ago has no analog today.

“Life will adapt, but in ways we don’t expect,” Dr. Christ said.

For the full story, see:

Carl Zimmer. “In DNA Two Million Years Old, A Glimpse of a Forested Arctic.” The New York Times (Thursday, December 8, 2022): A1 & A8.

(Note: ellipses added.)

(Note: the online version of the story has the date Dec. 7, 2022, and has the title “Oldest Known DNA Offers Glimpse of a Once-Lush Arctic.”)

“It’s Not Clear What We Are and Aren’t Allowed to Say”

(p. B1) When Gov. Gavin Newsom signed into law a bill that would punish California doctors for spreading false information about Covid-19 vaccines and treatments, he pledged that it would apply only in the most “egregious instances” of misleading patients.

It may never have the chance.

Even before the law, the nation’s first of its kind, takes effect on Jan. 1 [2023], it faces two legal challenges seeking to declare it an unconstitutional infringement of free speech. The plaintiffs include doctors who have spoken out against government and expert recommendations during the pandemic, as well as legal organizations from both sides of the political spectrum.

“Our system opts toward a presumption that speech is protected,” said Hannah Kieschnick, a lawyer for the Northern California branch of the American Civil Liberties Union, which submitted a friend-of-the-court brief in favor of one of the challenges, filed last month in U.S. District Court for the Central District of California.

That lawsuit and another, filed this month in the Eastern District of California, have become an extension of the broader cultural battle over the Covid-19 pandemic, which continues to divide Americans along stark partisan lines.

. . .

(p. B5) The plaintiffs in California have sought injunctions to block the law even before it goes into effect, arguing that it was intended to silence dissenting views.

One of them, Dr. Tracy Hoeg, a physician and epidemiologist who works in Grass Valley, near Sacramento, has written peer-reviewed studies since the pandemic began that questioned some aspects of government policies adopted to halt the spread of Covid-19.

Those studies, on the efficacy of masks for schoolchildren and the side effects of vaccines on young men, exposed her to vehement criticism on social media, she said, partly because they fell outside the scientific consensus of the moment.

She noted that the medical understanding of the coronavirus continues to evolve, and that doctors should be open to following new evidence about treatment and prevention.

“It’s going to cause this very broad self-censorship and self-silencing from physicians with their patients because it’s not clear what we are and aren’t allowed to say,” said Dr. Hoeg, one of five doctors who filed a challenge in the Eastern District. “We have no way of knowing if some new information or some new studies that come out are accepted by the California Medical Board as consensus yet.”

. . .

Dr. Jeff Barke, a physician who has treated Covid patients at his office in Newport Beach in Southern California, said the law was an attempt by the state to impose a rigid orthodoxy on the profession that would rule out experimental or untested treatments.

Those include treatments with ivermectin and hydroxychloroquine that he said he had found to be effective at treating the coronavirus, despite studies suggesting otherwise. “Who determines what false information is?” he said.

. . .

“What comes next?” he said. “How I talk to patients about cancer? How I talk to patients about obesity or diabetes or asthma or any other illnesses? When they have a standard of care that they think is appropriate and they don’t want me going against their narrative, then they’ll say Barke’s spreading misinformation.”

For the full story, see:

Steven Lee Myers. “Law to Stem Medical Misinformation Is Facing a Free Speech Challenge.” The New York Times (Thursday, December 1, 2022): B1 & B5.

(Note: ellipses, and bracketed year, added.)

(Note: the online version of the story has the date Nov. 30, 2022, and has the title “Is Spreading Medical Misinformation a Doctor’s Free Speech Right?”)

Funding People Instead of Projects Allows Researchers to Nimbly Pivot in the Light of Unexpected Discoveries

(p. A2) Patrick Collison, the Irish-born co-founder of payments technology company Stripe Inc., has spent a lot of the past five years pondering the problem of declining scientific productivity.

. . .

Clearly, scientific productivity has something to do with how research is done, not how much. One culprit, in the view of Mr. Collison and many others, is that the institutions that fund science have become process-oriented, narrow-minded and risk-averse. Wary of failure, they favor established researchers pursuing narrowly focused, incremental ideas over younger scientists with more heterodox agendas.

. . .

Yet Mr. Collison criticizes the federal government for failing to bring a much deeper and eager pool of talent to bear on a multitude of pandemic challenges. Top virologists “were stuck on hold, waiting for decisions about whether they could repurpose their existing funding for this exponentially growing catastrophe,” he wrote in an essay last year with George Mason University economist Tyler Cowen, and University of California, Berkeley bioengineering professor Patrick Hsu.

Sensing a need, the three in April, 2020 launched Fast Grants, $10,000 to $500,000 awards funded primarily by private donors and approved in 14 days or less.

. . .

When Messrs. Collison, Cowen and Tsu surveyed their recipients about their experiences with traditional funding, 57% told them they spent more than a quarter of their time on grant applications and 78% said they would change their research program a lot if they weren’t constrained in how they spent their current funding.

This reinforces a key insight from metascience, also known as the science of science, namely the value of curiosity-driven research. Heidi Williams, an economist at Stanford University and director of science policy at the Institute for Progress, said grants typically commit a scholar to complete a specific project, even if during the research the project proves less promising than expected.

. . .

In a 2009 paper, Massachusetts Institute of Technology economist Pierre Azoulay and his co-authors demonstrated the benefits of funding people over projects. Researchers backed by the Howard Hughes Medical Institute, which takes such an approach, produce far more widely cited papers—a metric of significance—than similar researchers funded by the National Institutes of Health. Drawing on those lessons, last year, Mr. Collison co-founded the Arc Institute to pre-fund scientists studying complex human diseases for renewable eight-year terms.

For the full commentary, see:

Greg Ip. “CAPITAL ACCOUNT; To Boost Growth, Rethink Science Funding.” The Wall Street Journal (Friday, Nov. 18, 2022): A2.

(Note: ellipses added.)

(Note: the online version of the commentary has the date November 17, 2022, and has the title “CAPITAL ACCOUNT; Stagnant Scientific Productivity Holding Back Growth.”)

The published version of Azoulay’s co-authored 2009 NBER working paper, mentioned above, is:

Azoulay, Pierre, Joshua S. Graff Zivin, and Gustavo Manso. “Incentives and Creativity: Evidence from the Academic Life Sciences.” RAND Journal of Economics 42, no. 3 (Fall 2011): 527-54.

Lancet Editorial Praised Chinese Communists’ Covid Policy of “Restricting Public Freedoms”

(p. A17) China’s zero-Covid policies have recently come under criticism from public-health leaders—including those at the World Health Organization—who once held them up as a model for the West.

“China’s success rests largely with a strong administrative system that it can mobilise in times of threat, combined with the ready agreement of the Chinese people to obey stringent public health procedures,” the Lancet editorialized on March 7, 2020. Western countries, it added, “must abandon their fears of the negative short-term public and economic consequences that may follow from restricting public freedoms as part of more assertive infection control measures.”

That hasn’t worn well. The negative social and economic consequences of lockdowns in the West—from learning losses and destroyed small businesses to alcoholism and drug abuse—weren’t “short-term.” Nor were China’s draconian zero-Covid policies, which three years later are only slowly being eased.

For the full commentary, see:

Allysia Finley. “LIFE SCIENCE; Western Scientists Cheered On China’s Covid Repression.” The Wall Street Journal (Monday, Dec. 12, 2022): A17.

(Note: the online version of the commentary has the date December 11, 2022, and has the same title as the print version.)

Some Gain-of-Function Bat Coronavirus Research in Wuhan Was Done in Level 2 Biosafety Lab (Instead of Higher Level 3 or 4)

(p. A1) Some scientists and officials in the Biden administration are pushing for more oversight, globally, of risky bioresearch. One focus is laboratory work that enhances a pathogen or endows it with new properties—sometimes called “gain-of-function” research—which is often done to assess its potential to infect humans.

. . .

(p. A12) Scientists and government officials have debated the risks of gain-of-function research since at least 2011, when virologists genetically modified the deadly H5N1 avian-flu virus so it could spread among ferrets.

. . .

Dr. Collins and Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, said the risks could be mitigated, and the information might accelerate efforts to develop vaccines or stop outbreaks.

. . .

Then in 2014, the U.S. government declared a pause to gain-of-function research on certain dangerous viruses and set out to develop a new set of rules following incidents including an unintentional exposure of lab workers to anthrax bacteria and a discovery of some decades-old overlooked vials of smallpox virus.

Some research was allowed to continue: work seeking to identify coronaviruses that might jump to humans. Ralph Baric at the Gillings School of Global Public Health at the University of North Carolina at Chapel Hill and colleagues published a study of a bat virus closely related to SARS, or Severe Acute Respiratory Syndrome, a disease that emerged in 2002 and killed nearly 800 people.

. . .

They inserted a portion of the bat virus into a SARS virus adapted for lab tests in mice—creating a novel pathogen—and sought to see whether it would infect human cells. It did, and in mice it caused disease, though less deadly than SARS.

Then, he and his colleagues published research showing that another virus closely related to SARS infected both mice and human airway cells in the lab. They warned it was “poised for human emergence.”

Dr. Baric has said he thinks SARS-CoV-2 most likely evolved naturally to infect humans, yet he joined the scientists who in May [2021] called for serious investigation of the lab-accident hypothesis as well.

Researchers in Wuhan used techniques similar to his to test whether eight SARS-like bat coronaviruses had the potential to infect human cells, according to a paper they published in 2017. It was part of an effort to find out how SARS-like bat viruses might make changes that would render them a danger to humans.

Biosafety levels in laboratory research range from 1—used in high-school or college labs for work that doesn’t pose a disease risk to humans—to 4, reserved for the most dangerous pathogens.

At least some of the bat-coronaviruses work at Wuhan was done in a level-2 lab, which some U.S. scientists say is too low a safety level for that kind of work.

For the full story, see:

Betsy McKay and Amy Dockser Marcus. “Virus Research Explodes, Igniting Worry.” The Wall Street Journal (Saturday, Sept. 25, 2021): A1 & A12.

(Note: ellipses, and bracketed year, added.)

(Note: the online version of the story has the date September 24, 2021, and has the title “Virus Research Has Exploded Since Covid-19 Hit. Is It Safe?”)

Heat Deaths Rise Mostly Due to Rise in Fragile Aging Population

(p. A17) One recent and much-cited Lancet report appears deliberately deceptive.

The study offers a frightening statistic: Rapidly rising temperatures have increased annual global heat deaths among older people by 68% in less than two decades. That stark figure has been cited all over, from the BBC and Time to the Washington Post and the Times of India, the world’s largest-selling English-language daily.

. . .

Annual heat deaths have increased significantly among people 65 and older world-wide. The average deaths per year increased 68% from the early 2000s to the late 2010s. But that is almost entirely because there are so many more older people today than there were 20 years ago, in no small part thanks to medical innovations that keep us alive longer. Measured across the same time span the Lancet maps heat deaths, the number of people 65 and older has risen by 60%, or almost as much as heat deaths. When the increase in heat mortality is adjusted for this population growth, the actual rise that can be attributed to rising temperatures is only 5%.

It is hard not to see the Lancet study’s failure to adjust this figure as a deliberate act of deception.

For the full commentary, see:

Bjorn Lomborg. “The Lancet’s ‘Heat Death’ Deception.” The Wall Street Journal (Saturday, November 5, 2022): A17.

(Note: ellipsis added.)

(Note: the online version of the commentary has the date November 4, 2022, and has the title “Climate Change and the Lancet’s ‘Heat Death’ Deception.”)

Collins and Fauci Did Not Seek Open Debate on the Great Barrington Declaration

(p. A15) The Trump Twitter ban almost pales in comparison with the speech limitations routinely enforced on discussion of climate and Covid. Instead of “hate” or “violence,” the elastic pretext for speech restriction here is “settled science.”

The essence of science was once open debate. But that’s no longer true. In a now-infamous 2020 email, National Institutes of Health Director Francis Collins wrote Anthony Fauci that the Great Barrington Declaration, a dissent from Covid-lockdown policy, needed “a quick and devastating published take down,” which soon appeared in the press.

For the full commentary, see:

Henninger, Daniel. “WONDER LAND; They Want to Shut You Up.” The Wall Street Journal (Thursday, December 15, 2022): A15.

(Note: the online version of the commentary has the date December 14, 2022, and has the title “WONDER LAND; They Want to Shut You (and 303 Creative) Up.”)

Dogs Can Accurately Know by Smell When a Human Is Stressed


(p. C4) Dogs are champion sniffers, equipped with 100 to 300 million olfactory receptors in their noses—compared with a mere 6 million in our own—and an olfactory cortex 40 times as large as ours. They can be trained to detect disease in human beings, including cancer cells, a latent epileptic seizure, or a Covid infection, just by sniffing—no blood samples, biopsies, MRIs, antigen or PCR tests required.

. . .

In a study published in September in the journal PLoS One, Ms. Wilson and colleagues tested whether dogs can read and respond to our emotional states, without the benefit of facial expression, tone of voice, or social context. The researchers trained four dogs to detect and react to the smell of human stress, depending on their sense of smell alone to distinguish between a person’s baseline scent and the unique cocktail of volatile organic compounds (VOCs) in their sweat and breath when they’re feeling stressed out.

. . .

The results offered overwhelming confirmation that dogs can smell psychological states as well as physical ones. On average, the four dogs picked out the stress sample 94% of the time, with individual dogs ranging between 90% and 97% accuracy. “There’s a smell to stress,” Ms. Wilson concludes. “If we can add it to the dog’s repertoire, we can use it to identify anxiety and panic attacks before they occur.”

For the full commentary, see:

Susan Pinker. “MIND AND MATTER; Dogs Can Sniff Out When a Human Is Stressed.” The Wall Street Journal (Saturday, Oct. 22, 2022): C4.

(Note: ellipses added.)

(Note: the online version of the commentary has the date October 20, 2022, and has the title “MIND AND MATTER; Dogs Can Sniff Out Human Stress.”)

How to Resist the Heat Death Implied by the Second Law of Thermodynamics

When I was a young philosophy student I sometimes worried that the Second Law of Thermodynamics ultimately made meaningless all human perseverance toward progress. Physics Nobel laureate Frank Wilczek gives young philosophers reasons for hope.

(p. C4) The capstone of thermodynamics is its so-called Second Law, . . ., which states that entropy, a measure of disorder, increases over time—distinctive structure erodes. Featureless equilibrium is the state of maximum entropy, toward which the Second Law drives us.

The inexorable logic of the Second Law leads, in the long run, to a bland universe wherein nothing changes—that is, heat death.

. . .

There are several ways that our distant descendants, or other embodiments of mind in the universe, might resist heat death. Here are some ideas that occurred to me . . .:

First, it is probably possible to burn matter further than stars do. Stars rearrange protons and neutrons but do not change their overall number. Burning those particles would give access to hundreds of times more energy. Another (barely) conceivable form of fuel is “dark matter.” At present, nobody knows what it is, but there’s lots of it in the universe.

Second, future engineers also might be able to arrange controlled collisions of planets or dead stars, to tap into the energy the crashes liberate.

Third, future minds themselves might be able to run on very limited power. Recent theoretical work on reversible and quantum computers, and on time crystals, has shown that there’s no lower limit to how little energy they need to keep making progress, or at least to keep moving.

Fourth, since we don’t really understand what triggered the Big Bang, it’s conceivable that someday we’ll be able to engineer something similar, and thereby rejuvenate the universe.

For the full commentary, see:

Frank Wilczek. “WILCZEK’S UNIVERSE; Delaying the Heat Death of The Universe.” The Wall Street Journal (Saturday, Sept. 3, 2022): C4.

(Note: ellipses added.)

(Note: the online version of the commentary has the date September 1, 2022, and has the same title as the print version.)

Through Evolution, Body Parts Are Inelegantly Repurposed into Workaround Kluges

If the body itself is an amalgam of workaround kluges, then maybe our regulators should be more tolerant of medical MacGyvers who attempt to keep the body working through medical workaround kluges.

(p. A15) Mr. Pievani is a professor of biology at the University of Padua. His brief and thoughtful book (translated from the Italian by Michael Gerard Kenyon) isn’t just a description of imperfection, but a paean to it. There’s plenty of description and discussion, too, as “Imperfection” takes the reader on a convincing whirlwind tour of the dangers as well as the impossibility of perfection, how imperfection is built into the nature of the universe, and into all living things—including ourselves.

. . .

Readers wanting to get up to speed on imperfection would do well to attend to two little-known words with large consequences. The first is “palimpsest,” which in archaeology refers to any object that has been written upon, then erased, then written over again (sometimes many times), but with traces of the earlier writings still faintly visible. Every living thing is an evolutionary palimpsest, with adaptations necessarily limited because they’re built upon previous structures.

Consider, for example, childbirth. As smart critters, we’ve been selected (naturally) to have big heads. But in becoming bipedal, we had to rotate our pelvises, which set limits on the size of the birth canal. As a result, an unborn baby’s head is perilously close to being too big to get out. Usually, they manage it, but not without much painful laboring and sometimes, if this cephalopelvic disproportion is too great, or if the baby is malpositioned, by means of a cesarean delivery. In such cases, obstetricians take the newborn out the obvious way: through that large, unobstructed abdominal space between pelvis and lower ribs. Things would have been much easier and safer for mother and baby if the birth canal were positioned there, too, but our palimpsest nature precludes such a straightforward arrangement.

Which brings us to our second unusual word: “kluge,” something—assembled from diverse components—that shouldn’t work, but does. A kluge is a workaround: often clumsy, inelegant, inefficient, but that does its job nonetheless. Because we and all other living things are living palimpsests, we are kluges as well.

For the full review, see:

David P. Barash. “BOOKSHELF; Unintelligent Design.” The Wall Street Journal (Wednesday, October 26, 2022): A15.

(Note: ellipsis added.)

(Note: the online version of the review has the date October 25, 2022, and has the title “BOOKSHELF; ‘Imperfection’ Review: Unintelligent Design.”)

The book under review is:

Pievani, Telmo. Imperfection: A Natural History. Translated by Michael Gerard Kenyon. Cambridge, MA: The MIT Press, 2022.