Air Canada Boeing 737 MAX Suffers Engine Fault On Ferry Flight

by Linnea Ahlgren
December 25, 2020

While on a ferry flight from the Sonoran Desert to Quebec on Tuesday, an Air Canada Boeing 737 MAX 8 declared urgency following indications of low pressure in the left engine and subsequent fuel imbalance from the left wing’s tank. The aircraft diverted to Tucson and landed without incident one hour and 20 minutes after departure.

An Air Canada 737 MAX diverted to Tuscon while on a ferry flight to Montreal on Tuesday. Photo: Getty Images

The crew decided to shut the engine down and divert

On December 22nd, an Air Canada 737 MAX was on its way from long-term storage at Pinal Airpark (MZJ) in Marana, Arizona, to Montreal in Quebec when two connected incidents caused its diversion to Tucson instead.

Flight AC2358 departed from MZJ at 09:32 local time with three crew on board. A short while after take-off, the pilots received a hydraulic low-pressure indication from the left engine.

The crew worked the check-lists and after consultation with dispatch and maintenance, they decided to continue to Canada and Montréal–Trudeau International Airport (YUL). However, that was not the end of their woes, the Aviation Herald reports.

Shortly thereafter, at 39,000 feet, the left-hand wing tank indicated fuel imbalance. At this point, the cockpit crew decided to shut the left engine down. They also declared the international standard urgency signal; PAN-PAN. Rather than continue north, the pilots then turned back and diverted to Tucson International Airport (TUS).

The aircraft landed without incident and was escorted to a remote location by the airport’s emergency services. Photo: Getty Images

Returning after nearly a year in the desert

The MAX landed safely on TUS’s runway 11L about 80 minutes after departure. Emergency services met the aircraft on the taxiway. Following an initial inspection, they accompanied it to a remote position on the apron. At the time of writing, the plane was still in Tucson. The Transportation Safety Board of Canada (TSB) has said it would conduct an investigation of the incident.

The aircraft in question is a 737 MAX 8 registered as C-FSNQ. It arrived with Air Canada in June 2018. It was transferred to the dry Arizona desert for storage in February this year and joined shortly thereafter by nearly all of Air Canada’s MAXs to Only three, C-FSNU, C-GEIV and C-GEJL, have thus far returned from Arizona.

Air Canada recently sold nine of its 737 MAXs for leaseback. 

Photo: Getty Images

The great MAX migration

The Canadian flag-carrier has a total of 24 MAX 8 jets already in its fleet. However, it has sold nine of them for leaseback in a bid for liquidity during the ongoing crisis. Meanwhile, the Star Alliance member is expecting delivery of another 14 of the aircraft.
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Boeing is underway to clearing its roster of ready but undelivered 737 MAX jets following the type’s recertification by the FAA a little over a month ago. However, one month following its ungrounding, only ten of the planes had made their way to their new owners.

While it appears to be unrelated to the software issues which caused the plane’s grounding, it is too early to say whether or not this incident will in any way impact Air Canada’s decision on when to bring the MAX back into service.

Simple Flying has reached out to the airline for a comment but was yet to receive a reply at the time of publication.

Linnea Ahlgren

Journalist - With a Masters in International Relations, Linnea has combined her love for current affairs with her passion for travel to become a key member of the Simple Flying team. With eight years’ experience in publishing and citations in publications such as CNN, Linnea brings a deep understanding of politics and future aviation tech to her stories. Based in Amsterdam, Netherlands.

Best of 2020: "Low class" Donald Trump and the Wasps
Our 2020 retrospective continues with this familial reckoning with vulgarity, snobbery and the presidency

By NELL BERAM
DECEMBER 26, 2020 SALON

This essay was originally published in Salon on February 17, 2020. We're revisiting Salon's Best Life Stories of 2020 now through the end of the year. Read more Best of 2020 here.

Try, just try to find a parody of a pair of Wasps more entertaining than Thurston and Lovey Howell of "Gilligan's Island." Played by Jim Backus, who was of Lebanese descent, and Natalie Schafer, who was Jewish, Thurston and Lovey behave the way people like to believe — and sometimes they're right — that real Wasps do: the Howells, possessors of fathomless inherited wealth, are duplicitous snobs who don't do any work. Some of the show's best lines nod to Thurston's blue-blooded Republicanism. When Lovey compliments him for being "democratic," he hears an uppercase D and snips at her, "Watch your language."

Thurston and Lovey are meant to be, like my ancestors of my mother's side, New England Wasps — in one episode, we're told that they're from Boston; another episode mentions a home in Newport, Rhode Island — but I don't recognize my family in the buffoonish Howells. True, my grandmother, whom I just about worshipped — she was quick-witted and cosmopolitan and tall, like Myrna Loy's Nora Charles in the "Thin Man" movies — was a Republican, and I did once witness her committing a Howell-ish act of snobbery. During a nostalgia road trip that brought us to her old neighborhood in Montclair, New Jersey, she described one style of residential architecture as "Wop," a derogatory term for Italian. She meant that the style looked modern, or like something that would never provide shelter for any self-respecting person whose ancestors came over on a boat in the queue behind the Mayflower.

If you had asked me about my background before Trump moved into the White House, I would have led with my father's Syrian side. (My long-legged, button-nosed maternal grandmother must have puzzled at the looks of me, short and with eyes and nostrils for days.) I saw my Wasp side as ethnically neutral — white bread that couldn't hold its own against all the more interesting loaves out there. But since Trump's presidency, I frequently find myself reaching for my grandmother's word, "vulgar," to describe him. You're using the word too, you say? Yes, but hopefully you're not using it with — what's this? — an involuntary air of condescension that I'm worried I may be mistaking for some sort of birthright.

I get why no one is standing on a chair and claiming Wasp as a cultural identity. Wasps went out in the mid-1900s, their markers — repressed colors, repressed emotions — swept aside in a cyclone of unkempt hair and pot smoke (some of it my mother's). Make no mistake: I'm as glad as anyone that Wasps got the cultural heave-ho — they'd been on top for far too long and have the whole snob thing to answer for. But last year I had some strangely gratifying eureka moments as I read Tad Friend's "Cheerful Money: Me, My Family, and the Last Days of Wasp Splendor." I recognized in it the window dressing of my childhood: Welsh rarebit. Beatrix Potter. "Grandfather clocks and cocktail shakers brimming with gin." Yes indeed, these were my people — much more so than my Syrian side. After my mother and father divorced when I was two I lived primary with her, our small house accommodating a condensed version of Wasp splendor. It was only after my mother died, in 2010, and I, her only child, inherited a squadron of antique end tables, which she told me on her deathbed I wasn't allowed to sell, that I realized I knew of no other person my age who had grown up in a home that resembled the set of "Leave It to Beaver."

Donald Trump doesn't live in a home that resembles the set of "Leave It to Beaver." Like the Howells, Trump is a Republican who inherited wealth and enjoys shiny things — his wives, his Fifth Avenue pile — and he delights in showing them off. This is how the Howells would fail a true-life Wasp sniff test: people with old money think that it's poor form to flaunt it. When I was a kid and behaved badly, my mother would accuse me of acting "spoiled," which only now do I appreciate meant like someone with a shamefully conspicuous amount of loot.

The Trumps and the Howells have something else in common besides their obvious pleasure in displaying their money: they love to talk about it. This trait makes me squirm even more than Trump's shticky name-calling, cotton candy hair, and allegiance to the trinity of lowbrow entertainment forms professional wrestling, reality television and the beauty pageant. No one ever explicitly told me why it's bad manners to talk about money, but I think the idea is that money is a personal matter, like hygiene, and that talk of it reflects a materialism upon which God (in whom my mother and grandmother unstintingly believed) would frown, which I hope it goes without saying is not remotely the same thing as implying that Wasps are above materialism. Of course, Wasps can get away with insisting that talking about money is vulgar because they generally have enough of it — bloody right my grandmother would have talked about the $54.17 she didn't have if she was in danger of losing her electricity because she couldn't pay her bill.

Where Wasps go wrong, I think, is mistaking bad manners for moral breaches. I have rampaged about Trump being "low-class" but then felt guilty because I know that someone's lack of decorum isn't a good reason to declare him unfit for elected office — I mean, a person should be perfectly free to talk about, say, what Hillary Clinton was doing in the bathroom during a debate break, as Trump did from the stage in 2015, and still earn my vote if he's solid on the issues, right? But as it happens, there are countless cocktail shakers brimming with sound moral reasons not to support Trump. For my grandmother, his greatest offense would have been his underhandedness: she was about nothing if not being aboveboard. (Again, I suppose she could afford to be, but let's give her this one.)

The best-known anecdote about my grandmother — it was trundled out at her funeral, in 1994 — is that well into her dotage she drove back to a store because upon arriving home she realized that the cashier had given her a few dollars too much in change. But I know a better, less funeral-friendly story about her. She had probably never voted for a Democrat in her life, but in 1972, her two hippie children convinced her that Richard Nixon was a crook, so she held her nose, clutched her pearls, and threw the lever for the uppercase D Democrat, George McGovern.

Just as I was idly and, it must be said, rather smugly assembling a mental list of Wasp virtues — we don't brag (Tad Friend writes of our "trademark self-deprecation"), we don't complain (although maybe we don't have much to complain about?), we invented noblesse oblige (because we could afford to, but still!) — it came to me that Trump, whose mother was Scottish and whose father was of German ancestry, is technically at least part Wasp. That took the glory out of my list making, as well it should have: I do know that Wasps haven't cornered the market on virtue. But may I claim for the Wasps just one trait that no one else would want, and with which, were it in my power, I would frost Trump's next beautiful piece of chocolate cake?

The whole point of being a Wasp, as best as I can conjure, is to get through life without embarrassing oneself in public. Trump's ancestors plainly failed to pass on this characteristic; otherwise, he would have known that — to use but one example of dozens — when someone flails his limbs in imitation of a disabled person, as Trump did at one of his rallies, it's not the disabled person who should be mortified.

NELL BERAM

Nell Beram is a former Atlantic Monthly staff editor, a former columnist for The Awl, and coauthor of "Yoko Ono: Collector of Skies."MORE FROM NELL BERAM

An Autopsy of Sidney Powell's 'Kraken' Reveals Suspiciously Similar Affidavits

Federal judges have been underwhelmed by the former Trump campaign lawyer's evidence of massive election fraud.

JACOB SULLUM | 12.25.2020 3:05 PM REASON MAGAZINE

EVEN AYN RAND OBJECTIVIST LIBERTARIANS AREN'T HAVING IT

(YouTube)

As part of her attempt to show that the presidential election was stolen through an elaborate international conspiracy, former Trump campaign lawyer Sidney Powell has submitted two affidavits from Venezuelans who purport to expose the roots of fraud-facilitating software that Powell claims switched Trump votes to Biden votes. Those affidavits include strikingly similar language that suggests they were written or edited by Powell or her colleagues rather than the affiants.

"I want to alert the public and let the world know the truth about the corruption, manipulation, and lies being committed by a conspiracy of people and companies intent upon betraying the honest people of the United States and their legally constituted institutions and fundamental rights as citizens," says a redacted affidavit from an unnamed individual who claims to have served on "the national security guard detail" for Venezuela's president. "This conspiracy began more than a decade ago in Venezuela and has spread to countries all over the world. It is a conspiracy to wrongfully gain and keep power and wealth. It involves political leaders, powerful companies, and other persons whose purpose is to gain and keep power by changing the free will of the people and subverting the proper course of governing."


An affidavit from Ana Mercedes Díaz Cardozo, a naturalized U.S. citizen who says she was "a career official for 25 years at the Supreme Electoral Council of Venezuela," includes a nearly identical passage. Díaz also describes herself as "an adult of the sound mine," while the anonymous Venezuelan affiant uses a similarly mistaken phrase, saying, "I am an adult of sound mine."

Dominion Voting Systems, one of the companies that Powell has implicated in the purported plot to steal the election, notes the similarities between the two Venezuelan affiants' descriptions of their motivations in a December 16 letter demanding that Powell retract her accusations and threatening a defamation lawsuit if she doesn't. Dominion says the fact that the two affiants used almost exactly the same language proves that "those witnesses did not each write their declarations independently" and strongly suggests that the "allegations of a decade-old international conspiracy were written or edited by you or your team—not by the witnesses themselves." The repetition of the "sound mine" error likewise suggests collaboration.

The Dominion letter also notes that another anonymous witness Powell has used in court, codenamed "Spyder" (sometimes "Spider") and identified by The Washington Post as Army veteran Joshua Merritt, has admitted he never worked in military intelligence, although Powell called him a "Military Intelligence expert" and his declaration described him as a former "electronic intelligence analyst under 305th Military Intelligence."

In an interview with the Post, Merritt blamed the erroneous information on Powell's "clerks," who he said wrote the relevant sentence. "That was one thing I was trying to backtrack on," he said. "My original paperwork that I sent in didn't say that."

Dominion notes several other striking errors in witness statements used by Powell. Navid Keshavarz-Nia, presented as a cybersecurity expert, famously placed "Edison County" in Michigan, where no such jurisdiction exists. Russell Ramsland, a cybersecurity analyst and former Republican congressional candidate, discussed locations in Minnesota while alleging fraud in Michigan. Ramsland also claimed that voter turnout in Detroit was an impossible 139 percent and that turnout in North Muskegon was an even more improbable 782 percent, which he presented as clear evidence of fraud. "In reality," Dominion says, "the turnout in those places was 50.88% and 78.11%, respectively."

Powell has submitted these statements, along with many others, as evidence in lawsuits challenging the election results in several states. Although Powell has likened her evidence to a "fire hose" and a Kraken, judges in those cases have been decidedly underwhelmed.

"Plaintiffs append over three hundred pages of attachments, which are only impressive for their volume," wrote Diane Humetewa, a federal judge in Arizona. "The various affidavits and expert reports are largely based on anonymous witnesses, hearsay, and irrelevant analysis of unrelated elections. Because the Complaint is grounded in these fraud allegations, the Complaint shall be dismissed."

In Michigan, U.S. District Judge Linda Parker said Powell offered "nothing but speculation and conjecture that votes for President Trump were destroyed, discarded or switched to votes for Vice President Biden." Parker observed that Powell's lawsuit "seems to be less about achieving the relief Plaintiffs seek—as much of that relief is beyond the power of this Court—and more about the impact of their allegations on People's faith in the democratic process and their trust in our government."

Powell filed a lawsuit in Wisconsin on behalf of William Feehan, a voter and potential presidential elector, and Derrick Van Orden, an unsuccessful Republican congressional candidate. But Van Orden said he never agreed to participate in the case, leaving only Feehan. While dismissing the lawsuit for lack of standing, U.S. District Court Judge Pamela Pepper marveled at the remedy sought by Powell, who argued that state officials should be ordered to decertify Wisconsin's election results. "Federal judges do not appoint the president in this country," Pepper wrote. "One wonders why the plaintiffs came to federal court and asked a federal judge to do so."

Timothy Batten, a federal judge in Georgia, was similarly perplexed. "In their complaint, the plaintiffs essentially ask the court for perhaps the most extraordinary relief ever sought in any federal court in connection with an election," he said. "They want this court to substitute its judgment for that of 2.5 million Georgia voters who voted for Joe Biden, and this I am unwilling to do."

Oxford’s Covid-19 vaccine is safe and effective, further data shows

Oxford’s Covid-19 vaccine is safe and effective, further data shows 

John Cairns/University of Oxford

FRI, 25 DEC, 2020 - 

NINA MASSEY, PA SCIENCE CORRESPONDENT

The University of Oxford’s coronavirus vaccine induces an immune response and is safe, according to more data published by researchers.

The UK has secured 100 million doses of the jab which the university is developing with pharmaceutical giant AstraZeneca.

And the Medicines and Healthcare products Regulatory Agency is currently considering whether or not to grant approval for the vaccine to be rolled out.

The research published on Thursday includes data from phase one/two clinical trials of the ChAdOx1 nCoV-19 Covid-19 vaccine, and shows why the team decided to move to a two-dose regimen in ongoing phase three trials.

The data also shows how the vaccine, developed with AstraZeneca, induces broad antibody and T cell functions.

Professor Katie Ewer at the University of Oxford said: “This highly detailed analysis of the immune responses to ChAdOx1 nCoV-19 further underpins the potential of this vaccine to induce protection against Covid-19 disease and provides additional reassurance of the safety of this approach.

“Using these advanced immunological techniques, we can better understand the different cellular and antibody-mediated mechanisms that contribute to the protection afforded by this vaccine, as demonstrated in the recent data from the subsequent phase three trials.”

Previous studies have shown that in order to develop any vaccine against Sars-CoV-2 coronavirus, two key elements of the immune system need to be activated.

These involve stimulating antibodies against the coronavirus spike protein, as well as robust T cell responses.

(PA Graphics)

The findings are reported in two papers, both released in the journal Nature Medicine.

One paper outlines the early-stage planning involved in the design of phase trials to investigate two booster dose schedules – a standard dose followed by a second standard dose and a standard dose followed by a lower dose.

Researchers used data from this to support the change to a two-dose regimen in the ongoing phase three trials.

The booster doses of the vaccine induced stronger antibody responses than a single dose, with the standard dose/standard dose activating the best response – supporting the decision to move to a two-dose vaccine regimen in phase three trials.

The paper also shows that many different antibody functions are triggered by the vaccine that may be important in protecting against the disease.

In the second paper, the authors detail an investigation of the T cell and antibody responses generated by the vaccine.

The authors report induction of a T cell subset, known to be particularly effective at clearing virus-infected cells from the body during infection.

This type of T cell response in combination with the detailed antibody profile is highly favourable for an efficacious vaccine, and further supports the profile of this vaccine as safe, researchers say.

RIP 
Cold War double agent George Blake dies at 98

BALANCE OF POWER

George Blake was a British spy who passed secrets to the Soviet KGB. He is considered a hero in Russia after exposing hundreds of Western agents during the Cold War.


George Blake at a news conference in Moscow in 1992

George Blake, a British spy who worked as a double agent for the Soviet Union, has died aged 98, Russian news agencies reported on Saturday.

An agent for the British foreign intelligence service MI6, Blake named hundreds of Western agents to the Soviet KGB in the 1950s. His case was among the most notorious of the Cold War.

Born in Rotterdam in the Netherlands in 1922, Blake joined the Dutch resistance in World War II before escaping to Britain in January 1943. After serving in the British Navy, he joined MI6 in 1944.

After serving three years in Hamburg, he was sent to Korea to gather intelligence on Communist North Korea, Communist China and the Soviet Far East. He was captured and imprisoned in 1950 when North Korean soldiers captured Seoul during the Korean War.

He returned to Britain in 1953 after his released and was sent to East Berlin two years later. He collected information on Soviet spies, but also passed secrets to Moscow about British and US operations.

Exposed in the 1960s

Blake was exposed as a double agent in 1961 and was sentenced to 42 years in prison. He broke out of prison five years later using a rope ladder with the help of three cellmates and fled across the Iron Curtain to the Soviet Union where he would live out his remaining days.

Blake, who went by the Russian name Georgy Ivanovich, was awarded the rank of colonel by the Russian intelligence service, from which he received a pension. Russian President Vladimir Putin, a former KGB agent himself, awarded him a medal in 2007.

Putin expressed his "deep condolences" to Blake's family and friends. "The memory of this legendary person will be preserved forever in our hearts," the Russian leader wrote in a condolence message on the Kremlin website.

British double agent George Blake, who spied for Soviets during Cold War, dies at 98
December 26, 2020
Agence France-Presse



George Blake, a former MI6 officer who worked as a double agent for the Soviet Union, walking in Moscow on June 28, 2001. © Yury Martyanov/Kommersant Photo/AFP

George Blake, who died in Russia on Saturday at the age of 98, was the last in a line of British spies whose secret work for the Soviet Union humiliated th

Britain says he exposed the identities of hundreds of Western agents across Eastern Europe in the 1950s, some of whom were executed as a result of his treason.

His case was among the most notorious of the Cold War, alongside those of a separate ring of British double agents known as the Cambridge Five.

Unmasked as a Soviet spy in 1961, Blake was sentenced to 42 years in London's Wormwood Scrubs prison. In a classic cloak-and-dagger story, he escaped in 1966 with the help of other inmates and two peace activists, and was smuggled out of Britain in a camper van. He made it through Western Europe undiscovered and crossed the Iron Curtain into East Berlin.00:00

He spent the rest of his life in the Soviet Union and then Russia, where he was feted as a hero.

Reflecting on his life in an interview with Reuters in Moscow in 1991, Blake said he had believed the world was on the eve of Communism.

"It was an ideal which, if it could have been achieved, would have been well worth it," he said.

"I thought it could be, and I did what I could to help it, to build such a society. It has not proved possible. But I think it is a noble idea and I think humanity will return to it."

Becoming a committed communist

Blake was born in Rotterdam in the Netherlands on Nov. 11, 1922, to a Dutch mother and an Egyptian Jewish father who was a naturalised Briton.

He escaped from the Netherlands in World War Two after joining the Dutch resistance as a courier and reached Britain in January 1943. After joining the British navy, he started working for the British Secret Intelligence Service, MI6, in 1944.

After the war, Blake served briefly in the German city of Hamburg and studied Russian at Cambridge University before being sent in 1948 to Seoul where he gathered intelligence on Communist North Korea, Communist China and the Soviet Far East.

He wAs captured and imprisoned when North Korean troops took Seoul after the Korean War began in 1950. It was during his time in a North Korean prison that he became a committed Communist, reading the works of Karl Marx and feeling outrage at heavy U.S. bombing of North Korea.

After his release in 1953, he returned to Britain and in 1955 was sent by MI6 to Berlin, where he collected information on Soviet spies but also passed secrets to Moscow about British and U.S operations.

Early mammal with remarkably precise bite

Researchers investigate teeth of a small carnivorous mammal that are almost 150 million years old

UNIVERSITY OF BONN

Research News

 

IMAGE: THE INVESTIGATED DENTITION OF P. FRUITAENSIS. THE UPPER MOLARS (M2, M3) ARE OFFSET FROM THE LOWER ONES (M2, M3). THIS CAUSES THE CUSPS TO INTERLOCK IN A WAY THAT CREATES... view more 

CREDIT: © THOMAS MARTIN, KAI R. K. JÄGER / UNIVERSITY OF BONN

Paleontologists at the University of Bonn (Germany) have succeeded in reconstructing the chewing motion of an early mammal that lived almost 150 million years ago. This showed that its teeth worked extremely precisely and surprisingly efficiently. Yet it is possible that this very aspect turned out to be a disadvantage in the course of evolution. The study is published in the journal "Scientific Reports".

At just twenty centimeters long, the least weasel is considered the world's smallest carnivore alive today. The mammal that researchers at the University of Bonn have now studied is unlikely to have been any bigger. However, the species to which it belongs has long been extinct: Priacodon fruitaensis (the scientific name) lived almost 150 million years ago, at a time when dinosaurs dominated the animal world and the triumph of mammals was still to come.

In their study, the paleontologists from the Institute for Geosciences at the University of Bonn analyzed parts of the upper and lower jaw bones of a fossil specimen. More precisely: its cheek teeth (molars). Because experts can tell a lot from these, not only about the animal's diet, but also about its position in the family tree. In P. fruitaensis, each molar is barely larger than one millimeter. This means that most of their secrets remain hidden from the unarmed eye.

The researchers from Bonn therefore used a special tomography method to produce high-resolution three-dimensional images of the teeth. They then analyzed these micro-CT images using various tools, including special software that was co-developed at the Bonn-based institute. "Until now, it was unclear exactly how the teeth in the upper and lower jaws fit together," explains Prof. Thomas Martin, who holds the chair of paleontology at the University of Bonn. "We have now been able to answer that question."

How did creatures chew 150 million years ago?

The upper and lower jaws each contain several molars. In the predecessors of mammals, molar 1 of the upper jaw would bite down precisely on molar 1 of the lower jaw when chewing. In more developed mammals, however, the rows of teeth are shifted against each other. Molar 1 at the top therefore hits exactly between molar 1 and molar 2 when biting down, so that it comes into contact with two molars instead of one. But how were things in the early mammal P. fruitaensis?

"We compared both options on the computer," explains Kai Jäger, who wrote his doctoral thesis in Thomas Martin's research group. "This showed that the animal bit down like a modern mammal." The researchers simulated the entire chewing motion for both alternatives. In the more original version, the contact between the upper and lower jaws would have been too small for the animals to crush the food efficiently. This is different with the "more modern" alternative: In this case, the cutting edges of the molars slid past each other when chewing, like the blades of pinking shears that children use today for arts and crafts.

Its dentition therefore must have made it easy for P. fruitaensis to cut the flesh of its prey. However, the animal was probably not a pure carnivore: Its molars have cone-shaped elevations, similar to the peaks of a mountain. "Such cusps are particularly useful for perforating and crushing insect carapaces," says Jäger. "They are therefore also found in today's insectivores." However, the combination of carnivore and insectivore teeth is probably unique in this form.

The cusps are also noticeable in other ways: They are practically the same size in all molars. This made the dentition extremely precise and efficient. However, these advantages came at a price: Small changes in the structure of the cusps would probably have dramatically worsened the chewing performance. "This potentially made it more difficult for the dental apparatus to evolve," Jäger says.

This type of dentition has in fact survived almost unchanged in certain lineages of evolutionary history over a period of 80 million years. At some point, however, its owners became extinct - perhaps because their teeth could not adapt to changing food conditions.

###

Publication: Kai R. K. Jäger, Richard L. Cifelli & Thomas Martin: Molar occlusion and jaw roll in early crown mammals; Scientific Reports, DOI: 10.1038/s41598-020-79159-4

Team finds surprising connection between dinosaurs and mammals

by University of Manitoba

A complete sabre-toothed canine from a gorgonopsian from Zambia. This specimen includes both the crown (top) and root (bottom) of the tooth. | . Credit: Megan Whitney.

When thinking of fierce predators of the past, it's difficult not to imagine dinosaurs, considering theropods are well known for having blade-like teeth with serrated cutting edges used for biting and ripping their prey.

Next, one might imagine another creature—saber-toothed cats—only they roamed the earth hundreds of millions of years later.

But, a team of researchers discovered a surprising connection between the two vastly different prehistoric animals. And yes, the similarity is in their teeth.

In a paper published in Biology Letters, Megan Whitney from Harvard University, Aaron LeBlanc from King's College London, Ashley Reynolds from the University of Toronto, and Kirstin Brink from the University of Manitoba, examined thin slices of fossilized teeth belonging to a gorgonopsian, a large predatory animal that lived roughly 260 million years ago and resembled a cross between a dinosaur and a saber-toothed cat.

The research team discovered that gorgonopsians, which are early ancestors to mammals and not related to dinosaurs, have very similar tooth structure to carnivorous dinosaurs. Indeed, up until now, it was thought that the complex arrangement of tissues that enabled dinosaurs to have such murderous teeth was unique to them. Turns out, other creatures found a way to grow them too, and first. "When you compare a dinosaur tooth to a gorgonopsian tooth, they look pretty similar, like a blade with serrated edges on the front and back," says Brink, an assistant professor in the Department of Geological Sciences in the Clayton H. Riddell Faculty of Environment, Earth, and Resources.

The team of researchers combined their expertise in paleohistology (the study of the microstructure of fossilized skeletal tissues) and examined thin sections of fossils from three synapsids—the group of animals the gorgonopsians belong too that are more closely related to mammals than reptiles on the tree of life—from three different time periods to test a theory of the structure of the serrations of their teeth.

A thin section of a partial gorgonopsian canine under polarized light. Serrations are evident on the right side of this specimen. Credit: Megan Whitney

"I was so sure that this somewhat complicated arrangement of tooth tissues in meat-eating dinosaurs was a character unique to dinosaurs that helped them become powerful predators in the Mesozoic period," says Brink.


"The findings in this study show that this type of tooth actually evolved about 20 million years before dinosaurs did. This suggests that this particular tooth structure is very efficient for biting and ripping into meat, and is a great example of convergent evolution—how a character or feature that evolves in very distantly related groups because of a similar function in the environment, not because of shared heritage—in the synapsid lineage and the reptile lineage. This tooth type evolved first in the synapsid lineage and was convergently evolved in dinosaurs much later."

In her previous work, Brink examined the internal microstructure (only visible with a microscope) of these serrations in dinosaurs to try and figure out how they develop, and if the microstructure could give clues to the function of the tooth. She found a unique arrangement of the tissues deep within the teeth of meat-eating dinosaurs, but not in other animals with serrated teeth like sharks, living lizards, plant-eating dinosaurs, saber-tooth cats, or Dimetrodon, which is an even older ancestor of gorgonopsians in the synapsid lineage.

"I concluded in 2015 that this arrangement of tissues was only found in meat-eating dinosaurs, and helped to strengthen the serrations so that they wouldn't get worn down or break while the dinosaur was eating its prey. This could have been one reason why meat-eating dinosaurs were so evolutionarily successful and dominated at the top of the food chain," says Brink.

The discovery surprised everyone. It meant that this type of serrated, cutting tooth evolved first in the prehistoric animals that eventually evolved into mammals, and only later evolved independently in dinosaurs.

"The results of the study were pretty surprising since we thought these microstructures were features found only in dinosaur teeth. In fact, this unique arrangement of tissues that form the serrations evolved first in the ancient ancestors of mammals, which are not related to dinosaurs at all, and much older."


Explore further

Researchers discover surprising connection between prehistoric dinosaurs and mammals in their teeth

More information: M. R. Whitney et al. Convergent dental adaptations in the serrations of hypercarnivorous synapsids and dinosaurs, Biology Letters (2020). 

DOI: 10.1098/rsbl.2020.0750

Journal information: Biology Letters

Provided by University of Manitoba

DECEMBER 24, 2020

Quantum philosophy: 

Four ways physics will challenge your reality

IT'S A QUANTUM UNIVERSE SINCE THEY TURNED ON LHC AT CERN

December 25, 2020 by Peter Evans
Credit: CC0 Public Domain

Imagine opening the weekend paper and looking through the puzzle pages for the Sudoku. You spend your morning working through this logic puzzle, only to realise by the last few squares there's no consistent way to finish it.

"I must have made a mistake," you think. So you try again, this time starting from the corner you couldn't finish and working back the other way. But the same thing happens again. You're down to the last few squares and find there is no consistent solution.

Working out the basic nature of reality according to quantum mechanics is a little bit like an impossible Sudoku. No matter where we start with quantum theory, we always end up at a conundrum that forces us to rethink the way the world fundamentally works. (This is what makes quantum mechanics so much fun.)

Let me take you on a brief tour, through the eyes of a philosopher, of the world according to quantum mechanics.

1. Spooky action-at-a-distance

As far as we know, the speed of light (around 300 million metres per second) is the universe's ultimate speed limit. Albert Einstein famously scoffed at the prospect of physical systems influencing each other faster than a light signal could travel between them.

Back in the 1940s Einstein called this "spooky action-at-a-distance". When quantum mechanics had earlier appeared to predict such spooky goings-on, he argued the theory must not yet be finished, and some better theory would tell the true story.

We know today it is very unlikely there is any such better theory. And if we think the world is made up of well-defined, independent pieces of "stuff", then our world has to be one where spooky action-at-a-distance between these pieces of stuff is allowed.

2. Loosening our grip on reality

"What if the world isn't made of well-defined, independent pieces of 'stuff'?" I hear you say. "Then can we avoid this spooky action?"

Yes, we can. And many in the quantum physics community think this way, too. But this would be no consolation to Einstein.

Einstein had a long-running debate with his friend Niels Bohr, a Danish physicist, about this very question. Bohr argued we should indeed give up the idea of the stuff of the world being well defined, so we can avoid spooky action-at-a-distance. In Bohr's view, the world doesn't have definite properties unless we're looking at it. When we're not looking, Bohr thought, the world as we know it isn't really there.

But Einstein insisted the world has to be made of something whether we look at it or not, otherwise we couldn't talk to each other about the world, and so do science. But Einstein couldn't have both a well-defined, independent world and no spooky action-at-a-distance … or could he?

3. Back to the future

The Bohr-Einstein debate is reasonably familiar fare in the history of quantum mechanics. Less familiar is the foggy corner of this quantum logic puzzle where we can rescue both a well-defined, independent world and no spooky action. But we will need to get weird in other ways.

If doing an experiment to measure a quantum system in the lab could somehow affect what the system was like before the measurement, then Einstein could have his cake and eat it too. This hypothesis is called "retrocausality", because the effects of doing the experiment would have to travel backwards in time.

If you think this is strange, you're not alone. This is not a very common view in the quantum physics community, but it has its supporters. If you are faced with having to accept spooky action-at-a-distance, or no world-as-we-know-it when we don't look, retrocausality doesn't seem like such a weird option after all.

4. No view from Olympus

Imagine Zeus perched atop Mount Olympus, surveying the world. Imagine he were able to see everything that has happened, and will happen, everywhere and for all time. Call this the "God's eye view" of the world. It is natural to think there must be some way the world is, even if it can only be known by an all-seeing God.

Recent research in quantum mechanics suggests a God's eye view of the world is impossible, even in principle. In certain strange quantum scenarios, different scientists can look carefully at the systems in their labs and make thorough recordings of what they see—but they will disagree about what happened when they come to compare notes. And there might well be no absolute fact of the matter about who's correct—not even Zeus could know!

So next time you encounter an impossible Sudoku, rest assured you're in good company. The entire quantum physics community, and perhaps even Zeus himself, knows exactly how you feel.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

This story is part of Science X Dialog, where researchers can report findings from their published research articles. Visit this page for information about ScienceX Dialog and how to participate.

Korean artificial sun sets the new world record of 20-sec-long operation at 100 million degrees

by National Research Council of Science & Technology
Credit: National Research Council of Science & Technology

The Korea Superconducting Tokamak Advanced Research (KSTAR), a superconducting fusion device also known as the Korean artificial sun, set the new world record as it succeeded in maintaining the high temperature plasma for 20 seconds with an ion temperature over 100 million degrees (Celsius).

On November 24 (Tuesday), the KSTAR Research Center at the Korea Institute of Fusion Energy (KFE) announced that in a joint research with the Seoul National University (SNU) and Columbia University of the United States, it succeeded in continuous operation of plasma for 20 seconds with an ion-temperature higher than 100 million degrees, which is one of the core conditions of nuclear fusion in the 2020 KSTAR Plasma Campaign.

It is an achievement to extend the 8 second plasma operation time during the 2019 KSTAR Plasma Campaign by more than 2 times. In its 2018 experiment, the KSTAR reached the plasma ion temperature of 100 million degrees for the first time (retention time: about 1.5 seconds).

To re-create fusion reactions that occur in the sun on Earth, hydrogen isotopes must be placed inside a fusion device like KSTAR to create a plasma state where ions and electrons are separated, and ions must be heated and maintained at high temperatures.

So far, there have been other fusion devices that have briefly managed plasma at temperatures of 100 million degrees or higher. None of them broke the barrier of maintaining the operation for 10 seconds or longer. It is the operational limit of normal-conducting device and it was difficult maintain a stable plasma state in the fusion device at such high temperatures for a long time.

In its 2020 experiment, the KSTAR improved the performance of the Internal Transport Barrier (ITB) mode, one of the next generation plasma operation modes developed last year and succeeded in maintaining the plasma state for a long period of time, overcoming the existing limits of the ultra-high-temperature plasma operation.

Director Si-Woo Yoon of the KSTAR Research Center at the KFE explained, "The technologies required for long operations of 100 million- plasma are the key to the realization of fusion energy, and the KSTAR's success in maintaining the high-temperature plasma for 20 seconds will be an important turning point in the race for securing the technologies for the long high-performance plasma operation, a critical component of a commercial nuclear fusion reactor in the future."

"The success of the KSTAR experiment in the long, high-temperature operation by overcoming some drawbacks of the ITB modes brings us a step closer to the development of technologies for realization of nuclear fusion energy," added Yong-Su Na, professor at the department of Nuclear Engineering, SNU, who has been jointly conducting the research on the KSTAR plasma operation.

Dr. Young-Seok Park of Columbia University who contributed to the creation of the high temperature plasma said: "We are honored to be involved in such an important achievement made in KSTAR. The 100 million-degree ion temperature achieved by enabling efficient core plasma heating for such a long duration demonstrated the unique capability of the superconducting KSTAR device, and will be acknowledged as a compelling basis for high performance, steady state fusion plasmas."

The KSTAR began operating the device last August and plans to continue its plasma generation experiment until December 10, conducting a total of 110 plasma experiments that include high-performance plasma operation and plasma disruption mitigation experiments, which are joint research experiments with domestic and overseas research organizations.

In addition to the success in high temperature plasma operation, the KSTAR Research Center conducts experiments on a variety of topics, including ITER researches, designed to solve complex problems in fusion research during the remainder of the experiment period.

The KSTAR is going to share its key experiment outcomes in 2020 including this success with fusion researchers across the world in the IAEA Fusion Energy Conference which will be held in May.

The final goal of the KSTAR is to succeed in a continuous operation of 300 seconds with an ion temperature higher than 100 million degrees by 2025.

KFE President Suk Jae Yoo stated, "I am so glad to announce the new launch of the KFE as an independent research organization of Korea. The KFE will continue its tradition of under-taking challenging researches to achieve the goal of mankind: the realization of nuclear fusion energy," he continued.

As of November 20, 2020, the KFE, formerly the National Fusion Research Institute, an affiliated organization of the Korea Basic Science Institute, was re-launched as an independent research organization.


Explore further  Superconducting tokamaks are standing tall

Provided by National Research Council of Science & Technology

Japanese spacecraft's gifts: 

Asteroid chips like charcoal

by Mari Yamaguchi

DECEMBER 24, 2020

 

This photo provided Thursday, Dec. 24, 2020, by the Japan Aerospace Exploration Agency (JAXA), shows soil samples, seen inside the A compartment of the capsule brought back by Hayabusa2, in Sagamihara, near Tokyo. Japanese space officials said Thursday they found more asteroid soil samples collected and brought back from the Hayabusa2 spacecraft, in addition to black sandy granules they found last week, raising their hopes of finding clues to the origins of the solar system. (JAXA via AP)

They resemble small fragments of charcoal, but the soil samples collected from an asteroid and returned to Earth by a Japanese spacecraft were hardly disappointing.


The samples Japanese space officials described Thursday are as big as 1 centimeter (0.4 inch) and rock hard, not breaking when picked up or poured into another container. Smaller black, sandy granules the spacecraft collected and returned separately were described last week.

The Hayabusa2 spacecraft got the two sets of samples last year from two locations on the asteroid Ryugu, more than 300 million kilometers (190 million miles) from Earth. It dropped them from space onto a target in the Australian Outback, and the samples were brought to Japan in early December.

The sandy granules the Japan Aerospace Exploration Agency described last week were from the spacecraft's first touchdown in April 2019.

The larger fragments were from the compartment allocated for the second touchdown on Ryugu, said Tomohiro Usui, space materials scientist.

To get the second set of samples in July last year, Hayabusa2 dropped an impactor to blast below the asteroid's surface, collecting material from the crater so it would be unaffected by space radiation and other environmental factors.

This photo provided by the Japan Aerospace Exploration Agency (JAXA) shows soil samples, seen inside a container of the re-entry capsule brought back by Hayabusa2, in Sagamihara, near Tokyo, Tuesday, Dec. 15, 2020. Officials from Japan's space agency said Tuesday they have found more than the anticipated amount of soil and gases inside a small capsule the country's Hayabusa2 spacecraft brought back from a distant asteroid this month, a sample-return mission they praised as a milestone for planetary research.(JAXA via AP)

This optical microscope photo provided Thursday, Dec. 24, 2020, by the Japan Aerospace Exploration Agency (JAXA), shows soil samples, seen inside C compartment of the capsule brought back by Hayabusa2, in Sagamihara, near Tokyo. Japanese space officials said Thursday they found more asteroid soil samples collected and brought back from the Hayabusa2 spacecraft, in addition to black sandy granules they found last week, raising their hopes of finding clues to the origins of the solar system. (JAXA via AP)

In this Dec. 8, 2020, file photo, Japan Aerospace Exploration Agency (JAXA) Hayabusa2 project manager Yuichi Tsuda speaks during a press conference after a capsule containing asteroid soil samples returned to Japan, in Sagamihara, near Tokyo. Officials from Japan's space agency said Tuesday, Dec. 15, they have found more than the anticipated amount of soil and gases inside a small capsule the country's Hayabusa2 spacecraft brought back from a distant asteroid this month, a mission they praised as a milestone for planetary research. (Yu Nakajima/Kyodo News via AP, File)

This photo provided by the Japan Aerospace Exploration Agency (JAXA), shows soil samples, seen inside a container of the re-entry capsule brought back by Hayabusa2, in Sagamihara, near Tokyo,Tuesday, Dec. 15, 2020. Officials from Japan's space agency said Tuesday they have found more than the anticipated amount of soil and gases inside a small capsule the country's Hayabusa2 spacecraft brought back from a distant asteroid this month, a sample-return mission they praised as a milestone for planetary research.(JAXA via AP)

Usui said the size differences suggest different hardness of the bedrock on the asteroid. "One possibility is that the place of the second touchdown was a hard bedrock and larger particles broke and entered the compartment."

JAXA is continuing the initial examination of the asteroid samples ahead of fuller studies next year. Scientists hope the samples will provide insight into the origins of the solar system and life on Earth. Following studies in Japan, some of the samples will be shared with NASA and other international space agencies for additional research.

Hayabusa2, meanwhile, is on an 11-year expedition to another small and distant asteroid, 1998KY26, to try to study possible defenses against meteorites that could fly toward Earth.

Explore further Japan's space agency finds ample soil, gas from asteroid

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