A solar storm will be causing a super-charged Aurora Borealis over the Northern Hemisphere tonight. The NOAA estimates that virtually all of Canada and slivers of the United States, Russia, and Northwestern Europe have close to a 100% chance of seeing it (weather permitting? can you see the aurora through clouds?).


 
Neanderthal–human baby-making was recent — and brief

Mixing between Neanderthals and Homo sapiens lasted less than 7,000 years — a remarkably short time considering that almost every living individual not of African ancestry carries a substantial amount of Neanderthal DNA. Researchers compared the genomes of individuals who lived between 2,200 and 45,000 years ago with those of modern people and found that the genetic intermingling started around 47,000 years ago. It ended around the time when Neanderthals went extinct.

This large-scale, multi-millennia-spanning comparison made it more straightforward to monitor ‘introgression’ of Neanderthal-derived sequences into the modern human genome. The results indicated that Neanderthal-derived genetic contributions in the modern samples could be traced to a single ‘pulse’ of gene flow starting roughly 47,000 years ago — more recently than originally projected —and spanning some 6,800 years, ending around the same time that Neanderthals were nearing extinction. Nearly 7,000 years might seem like a long time, but it is remarkably short on evolutionary timescales considering the sizable changes that the human genome underwent.

Notably, many of the Neanderthals’ genomic contributions were subsequently removed with remarkable speed from the H. sapiens genome. Modern human genomes contain vast ‘deserts’ that have been fully cleared of Neanderthal remnants — but the authors detected these deserts even in ancient genomes from the latest stages of human–Neanderthal interaction. According to Emilia Huerta-Sanchez, an evolutionary biologist at Brown University in Providence, Rhode Island, this suggests that many Neanderthal sequences could have been detrimental to humans, and were therefore actively and rapidly selected against by evolution.
 
Or killed off. I can't remember where modern science sits on the relations between Neanderthals and home sapiens. I know we've investigated the violence angle a bit and the conclusion hasn't always been the same.
On an individual level both certainly happened.
 

Scientists tested replica Bronze Age armour on Greek marines. Here's what they learned​

Despite its bulky appearance, the copper plate armour proved versatile and practical in combat simulations

learned
More than a dozen elite Greek marines dressed up like Bronze Age warriors and practised ancient fighting techniques — all in the name of science.

The 13 soldiers, all members of the Hellenic Armed Forces, roleplayed as warriors from Greece's late Bronze Age, known as the Mycenaean civilization, in order to test the combat suitability of a 3,500-year-old suit of armour.

The study, published last week in the journal PLOS One, is being hailed by some experts for its innovative approach of mixing physiology, the study of how the human body works, with archeology, the study of ancient materials and remains.

But they also questioned the historical accuracy of the simulated combat, and cautioned against using this one suit of armour to draw broad conclusions about the Mycenaeans — people whose cultures and societies remain something of a mystery.

Recreating ancient conditions

At the heart of the study is a suit of Mycenaean armour discovered in the southern Greek village of Dendra in 1960.

Made of copper alloy plating tied together with leather, and featuring a boar-tusk helmet, it is one of the oldest complete suits of European armour in existence.

But, given its weight and bulk, there's long been debate about its purpose.

"The main question was: Was that particular armour for ceremonial purposes, or was it also a battle tool?" University of Thessaly physiologist Yiannis Koutedakis, one of the study's authors, told As It Happens host Nil Köksal.

"The verdict was that it could be used for both."

To reach that conclusion, Koutedakis and his colleagues created a replica of the Dendra armour, then tested it on modern soldiers during a gruelling, 11-hour simulation of late Bronze Age combat.

Using descriptions of the legendary Trojan War from Homer's Iliad as a guide, the soldiers fought, tossed javelins, ran on treadmills and carried out various combat movements. Throughout, scientists monitored their blood sugar, heart rates, oxygen intake, core temperatures and more.

The team also tried to mimic Bronze Age battle conditions by recruiting male volunteers of roughly the same age as ancient Greek soldiers, controlling the temperature of the room where they performed combat simulations, and feeding the participants a traditional diet of meats, dry bread, goat cheese, olives and red wine. No coffee was allowed.

"We measured the physical … impact that this armour had on the individuals, and we noticed that it was fine, not something extreme," Koutedakis said. "It was heavy, but not too heavy. Not unbearable."

The findings back up earlier research by archaeologist Barry Molloy who, in a 2013 analysis, concluded the Dendra armour was fit for extensive combat.

Molloy was unavailable for comment, but he told National Geographic: "Suits of armour like this would have transformed the battlefield."

Who were the Mycenaeans?

The study's authors write that their findings "support the notion that the Mycenaeans had such a powerful impact in Eastern Mediterranean [society,] at least partly as a result of their armour technology."

But Dimitri Nakassis, an archeologist at the University of Colorado Boulder who specializes Mycenaean societies, cautioned that there's a lot we don't know about this period — including whether the Mycenaeans were really the fierce warrior culture they were reputed to be.

"I think most archaeologists would recognize [Mycenaean is] kind of a shorthand," Nakassis, who wasn't involved in the study, told CBC.

"We don't know who these people were. We don't know what they called themselves. We don't know that they had a kind of unified identity."

In order to be certain this style of armour gave Mycenaeans an advantage on the battlefield, he says more evidence that it was in wide usage is needed.

What's more, he says similar experiments are needed on other sets of armour from the same period.

"They suggest ... maybe this gave the Mycenaeans an edge, and I think that's a possibility that we should take seriously," Nakassis said. "But, obviously, it requires more research."

Historical inaccuracies

There were also limitations on the researchers' ability to perfectly replicate Bronze Age combat in a historically accurate way.

Ioannis Georganas, an independent archeologist and member of the Society of Ancient Military Historians, noted that while Dendra armour was 90 per cent copper and 10 per cent tin, the replica was 95 per cent copper and five per cent zinc.

What's more, he said, in an email to CBC, basing the combat simulations on Homer's epic poetry is "more than problematic."

Scholars have long debated what's fact and what's fiction in Homer's tales. The Trojan War was set centuries after the Dendra armour was created, and some 500 years before Homer was even born.

In the study, the researchers acknowledged both of these shortcomings, noting they used the closest approximation of metals, and the most accurate descriptions of Bronze Age combat that they could get their hands on.

They say these discrepancies don't call into question their key finding — that the Dendra armour is practical, versatile, and combat ready.

Despite their caveats, both Georganas and Nakassis said they welcomed the study's unique approach to blending physiology with archeology, and said they hope to see more research like it.

Koutedakis agrees.

"We have now coined a new term — archeo-physiology," he said. "And I hope that ... other projects may be done in a similar way, and that will be very good."

Asked if he had a chance to try on the replica armour himself, Koutedakis immediately replied: "Of course I did!"

"To have something on your body, which you knew that people were wearing 3,500 years ago," he said, "that feeling is really amazing."
https://www.cbc.ca/radio/asithappens/greek-bronze-age-armour-study-1.7217371
 
Japan’s push to make all research open access is taking shape
Japan will start allocating the ¥10 billion it promised to spend on institutional repositories to make the nation’s science free to read.

The Japanese government is pushing ahead with a plan to make Japan’s publicly funded research output free to read. In June, the science ministry will assign funding to universities to build the infrastructure needed to make research papers free to read on a national scale. The move follows the ministry’s announcement in February that researchers who receive government funding will be required to make their papers freely available to read on the institutional repositories from January 2025.

The Japanese plan “is expected to enhance the long-term traceability of research information, facilitate secondary research and promote collaboration”, says Kazuki Ide, a health-sciences and public-policy scholar at Osaka University in Suita, Japan, who has written about open access in Japan.

The nation is one of the first Asian countries to make notable advances towards making more research open access (OA) and among the first countries in the world to forge a nationwide plan for OA.

More at...
 
Puny humans!

Scientists Find the Largest Known Genome Inside a Small Plant

Last year, Jaume Pellicer led a team of fellow scientists into a forest on Grande Terre, an island east of Australia. They were in search of a fern called Tmesipteris oblanceolata. Standing just a few inches tall, it was not easy to find on the forest floor. "It doesn't catch the eye," said Dr. Pellicer, who works at the Botanical Institute of Barcelona in Spain. "You would probably step on it and not even realize it." The scientists eventually managed to spot the nondescript fern. When Dr. Pellicer and his colleagues studied it in the lab, they discovered it held an extraordinary secret. Tmesipteris oblanceolata has the largest known genome on Earth. As the researchers described in a study published on Friday, the fern's cells contain more than 50 times as much DNA as ours do. [The analysis revealed the species T. oblanceolata to have a record-breaking genome size of 160.45 Gbp, which is about 7% larger than that of P. japonica (148.89 Gbp). For comparison, the human genome contains about 3.1 Gbp distributed across 23 chromosomes and when stretched out like a ball of yarn, the length of DNA in each cell only measures about 2m.

A 160 Gbp fork fern genome shatters size record for eukaryotes
 
Does anyone have access to this article fron New Scientist?

A new theoretical model suggests time may only exist due to entanglement between quantum objects.

What is time?
Time may not be a fundamental element of our physical reality. New calculations add credence to the idea that it emerges from quantum entanglement, in which two objects are so inextricably linked that disturbing one disrupts the other, no matter how distant they are. Alessandro Coppo at the National Research Council of Italy and his colleagues put a promising but strange idea from the 1980s through several mathematical tests. At its core is the suggestion that when we see an object change over time, that is only because that object is entangled with a clock. That means a truly external observer standing outside the entangled system would see a completely static, unchanging universe. Within this framework time is not a given, but purely a consequence of entanglement
 
Does anyone have access to this article fron New Scientist?

A new theoretical model suggests time may only exist due to entanglement between quantum objects.

What is time?
Time may not be a fundamental element of our physical reality. New calculations add credence to the idea that it emerges from quantum entanglement, in which two objects are so inextricably linked that disturbing one disrupts the other, no matter how distant they are. Alessandro Coppo at the National Research Council of Italy and his colleagues put a promising but strange idea from the 1980s through several mathematical tests. At its core is the suggestion that when we see an object change over time, that is only because that object is entangled with a clock. That means a truly external observer standing outside the entangled system would see a completely static, unchanging universe. Within this framework time is not a given, but purely a consequence of entanglement
There is this.
 
I have to point out at the start that odd apparent correlations in data that are not really there when the data is looked at holistically is a real thing and explains a lot of things. It also has to be pointed out that this is not the first time one of these people has been making such claims, a point made but not explored in the article. On the other hand "the man" has got form about lying about this sort of thing.

Top Canadian scientist alleges in leaked emails he was barred from studying mystery brain illness

A leading federal scientist in Canada has alleged he was barred from investigating a mystery brain illness in the province of New Brunswick and said he fears more than 200 people affected by the condition are experiencing unexplained neurological decline.

“All I will say is that my scientific opinion is that there is something real going on in [New Brunswick] that absolutely cannot be explained by the bias or personal agenda of an individual neurologist,” wrote Michael Coulthart, a prominent microbiologist. “A few cases might be best explained by the latter, but there are just too many (now over 200).”

New Brunswick health officials warned in 2021 that more than 40 residents were suffering from a possible unknown neurological syndrome, with symptoms similar to those of the degenerative brain disorder Creutzfeldt-Jakob disease. Those symptoms were varied and dramatic: some patients started drooling and others felt as though bugs were crawling on their skin.

Spoiler Last time :

1990: Gummer enlists daughter in BSE fight

The government has again attempted to reassure the public that British beef is safe, despite growing fears over the cattle disease, Bovine Spongiform Encephalopathy (BSE).

The Minister of Agriculture, John Gummer, even invited newspapers and camera crews to photograph him trying to feed a beefburger to his four-year-old daughter, Cordelia, at an event in his Suffolk constituency.

Although his daughter refused the burger, he took a large bite himself, saying it was "absolutely delicious".
 
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