Science
A woman's place? Out hunting with spears, study finds – Bangkok Post
WASHINGTON – A new study says a woman’s place might never have been at home to begin with.
Scientists said Wednesday they had discovered the 9,000-year-old remains of a young woman in the Peruvian Andes alongside a well-stocked big game hunting toolkit.
Based on a further analysis of 27 individuals at burial sites with similar tools, a team led by Randall Haas at the University of California, Davis concluded that between 30 to 50 percent of hunters in the Americas during this period may have been women.
The paper, published in the journal Science Advances, contradicts the prevalent notion that in hunter-gatherer societies, the hunters were mainly men and the gatherers were mainly women.
“I think it tells us that for at least some portion of human prehistory, that assumption was inaccurate,” Haas told AFP.
He added that the results “highlight the disparities in labor practice today, in terms of things like gender pay gaps, titles, and rank. The results really underscore that there may be nothing ‘natural’ about those disparities.”
The skeletal remains of six people including two hunters were discovered in 2018 by Haas and members of the local Mulla Fasiri community at Wilamaya Patjxa, an important archaeological site in highland Peru.
Analyses of the hunters’ bone structure as well as biological molecules called peptides in their tooth enamel allowed scientists to identify one as a 17- to 19-year-old female, and the second as a 25- to 30-year-old male.
Excavating the teen’s burial site was particularly “interesting and exciting” for the team, said Haas.
As they dug, they uncovered an array of hunting and animal processing tools that provided strong evidence for her hunter status.
These included stone projectile points for felling large animals, a knife and flakes of rock for removing internal organs, and tools for scraping and tanning hides.
The artifacts were likely placed together in a perishable container like a leather bag.
According to the paper, the teen, dubbed “WMP6” by the scientists, would have used a weapon called an “atlatl,” a spear throwing lever that allowed our ancient ancestors to throw spears much further.
Her main prey at the time would have been species like the vicuna, a wild ancestor of the alpaca, and Andean deer.
– Not an anomaly –
To find out whether the female hunter was an outlier, or one of many from her time, the researchers conducted a review of 429 individuals buried across 107 sites in the Americas from around 17,000 to 4,000 years ago.
Of those, they found 27 individuals whose sex had reliably been determined and who were buried alongside big game hunting tools — finding that 16 were male and 11 were female.
“The sample is sufficient to warrant the conclusion that female participation in early big-game hunting was likely nontrivial,” the team wrote, using a statistical model to estimate between 30-50 percent of hunters in these societies were women.
The new study adds to a body of literature that supports “the contention that modern gender constructs often do not reflect past ones,” the team wrote.
This includes the 2017 confirmation of a female Viking warrior through a genetic study.
Certain questions remain — such as why many modern hunter-gatherer societies do show sex-bias in hunting activities.
Theories include they could have been influenced by outsiders.
Or, perhaps the atlatl tool used by WMP6 and her contemporaries had a less steep learning curve than the technologies that succeeded it, making it possible to achieve proficiency in childhood before girls reached sexual maturity and had to devote their time to childcare and rearing.
By contrast, mastering the bow and arrow requires ongoing practice well into the teenage years.
Haas said he hoped his paper might spark further research to find out whether there were female hunters at the time in other parts of the world.
Science
NASA confirms mystery object that crashed through roof of Florida home came from space station – Toronto Sun
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NAPLES, Fla. (AP) — NASA confirmed Monday that a mystery object that crashed through the roof of a Florida home last month was a chunk of space junk from equipment discarded at the International Space Station.
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The cylindrical object that tore through the home in Naples on March 8 was subsequently taken to the Kennedy Space Center in Cape Canaveral for analysis.
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The space agency said it was a metal support used to mount old batteries on a cargo pallet for disposal. The pallet was jettisoned from the space station in 2021, and the load was expected to eventually fully burn up on entry into Earth’s atmosphere, but one piece survived.
The chunk of metal weighed 1.6 pounds (0.7 kilograms) and was 4 inches (10 centimetres) tall and roughly 1 1/2 inches (4 centimetres) wide.
Homeowner Alejandro Otero told television station WINK at the time that he was on vacation when his son told him what had happened. Otero came home early to check on the house, finding the object had ripped through his ceiling and torn up the flooring.
“I was shaking. I was completely in disbelief. What are the chances of something landing on my house with such force to cause so much damage,” Otero said. “I’m super grateful that nobody got hurt.”
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Science
Total solar eclipse: Continent watches in wonder – Yahoo News Canada
Across Mexico, the US and Canada, inside a ribbon of land stretching 155 miles wide but more than 4,000 miles long, tens of millions of people craned their necks, tilted their heads to the sky and watched in wonder as the day turned to night.
What many saw on Monday was a phenomenon like no other: the Moon moving between the Earth and the Sun, extinguishing its light in a total solar eclipse.
The path of totality spanned the continent, beginning over the warm sands of a Mexican beach town and darkening the skies above the crashing waters of Niagara Falls before ending its journey on the shores of Canada’s Newfoundland.
It left a sense of awe in its wake, a reminder of our planet’s place in the universe.
The eclipse was first seen around Mazatlán, Mexico, on the country’s western shores at 11:07 local time (18:07 GMT).
At first, the Moon’s outer edge seemed to just be touching the Sun. Then it devoured more and more until cheers erupted as all finally went dark – save for the silvery glow of the “corona” effect of the Sun around the Moon’s outline.
A thousand miles away in Dallas, Texas, 11-year-old Ady Walton-King was waiting, weeks of pent-up excitement ready to burst.
She had learned all about the eclipse in her fifth-grade class at Dallas Academy and on Monday morning she laced up her shoes and tucked four pairs of eclipse glasses into her pink purse – one for herself, one for each parent and one for her little sister, Abigail.
Just before it started, Ady sat down beside her dad, Ryan, on a school field in central Dallas and lifted her gaze upward.
And then it happened.
It all felt slow, she said, as she described the Texas afternoon turning dark. “It looked like the Moon was biting the Sun, but without the teeth marks.”
Clouds slid in and out, occasionally blocking the eclipse from view until the Sun had vanished, nothing left but little flares of light around the Moon.
“I didn’t think it would be like that,” Ady said. “It was really dark out. I thought it would be like evening dark, but it was pretty close to pitch black.”
The temperature dropped suddenly and, just as she had been taught, animals fell silent.
“As it started to get lighter the crickets were there, and the birds started singing. It was really crazy,” she said. “I’m sad it’s over.”
From there, the eclipse moved on, carving its path north-east through the United States.
For some, the solar phenomenon was marked by a personal milestone, with hundreds of Americans joining one of several mass wedding events dotted across the path of totality.
In Russellville, Arkansas, 300 couples from across the country signed up, saying “I do” just before the sky went black. As the sky brightened, the group cut wedding cakes and danced – all part of the aptly named Total Eclipse of the Heart festival.
Following the Moon one state over, in Ellsinore, Missouri, was amateur astronomer Darcy Howard, who had driven from her home in central Arkansas to be sure bad weather didn’t block her view.
She had seen many eclipses before today, two totals, one annular and two partials. “Each one has its own fingerprint,” she said.
Totality today, at around 13:56 local time (18:56 GMT) brought an “eerie twilight”, Ms Howard said, with dusky colours dotted all along the horizon. The corona was nearly as bright as a full moon. “The sense of other-worldliness was all around,” she said.
The 70-year-old has loved the cosmos since her childhood, since her father showed her the Big Dipper, the North Star and the Milky Way, and bought her her first telescope.
“I was hooked,” she said. “I can look through a telescope and see Jupiter… I can see Saturn. And when I see that in space, I know all is right with the world.”
By 15:13 local time (20:13 GMT), the total eclipse had plunged the midwestern state of Ohio into darkness.
In Cleveland, where eclipse-watchers were graced by clear skies, the Sun’s corona was clearly visible, a brilliant halo framing the Moon.
The stars came out in the middle of the day, a sight met with cheers and fireworks, a mid-April New Years Eve.
Many big American cities were not lucky enough to be on the path of totality – but the spectacles were still awe-inspiring. In New York, hundreds of people crowded on to the viewing platform of the Edge skyscraper in Manhattan to see what they could see.
They did not leave disappointed as the sun shrank to a crescent-like sliver of light that cast an unearthly pale gloom over the city.
Tourists had crowded along both sides of the border at Niagara Falls, where the eclipse path crossed from the US into Canada.
Here, the weather offered a formidable challenge, with thick grey clouds mostly obscuring the sky from view.
But just in time for totality – to the audible delight of the crowd – the clouds parted to reveal the black-hole Sun.
Nearby, on a Niagara City Cruise, 309 people celebrated by record-breaking – dressing up as the Sun to break the Guinness World Record for “Largest gathering of people dressed as the Sun”.
The relentless motion of the heavenly bodies meant that the phenomenon did not last long, and it was Montreal that next got its chance to be plunged into temporary night.
In Montreal, 20,000 people crowded onto a field on McGill University’s campus for an event held by the school’s Trottier Space Institute.
“We had been expecting 8,000,” programme administrator Caroina Cruz-Vinaccia said after. The weather was perfect, clear and bright skies. At the moment of totality, the crowd erupted at once, she said.
“I still can’t quite find the words for how cool this was,” she said. “We’re still coming down.”
Crowds were smaller on Newfoundland’s Fogo Island, on Canada’s east coast – one of the last places the totality could be viewed.
Bethany Downery, a Newfoundland native who works for the European Space Agency, tuned into the spectacular view from the Fogo Island Inn, nestled right against the Atlantic Ocean.
The skies were overcast, she said, but the clouds moved miraculously in time to catch near totality.
And with that, a day of collective wonder and celebration reached its conclusion. But it had left a permanent mark on many of those who had witnessed it.
In Dallas, a few thousand miles back along the path, Ady Walton-King was making plans.
Texas will not be in the path of totality again for another 300 years, so she’ll have to travel for the next one in North America, in 2044.
And by that time, she’ll be even more of an expert on total eclipses. “I want to be a scientist by the time that happens,” she said.
– With additional reporting from Brandon Livesay, Nada Tawfik, Nadine Yousif and Helena Humphrey
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Science
Sour gas additive found in Alberta's groundwater – CTV News Calgary
A compound used to treat sour gas that’s been linked to fertility issues in cattle has been found throughout groundwater in the Prairies, according to a new study.
Scientists at the University of Guelph and University of Saskatchewan have identified “large contaminant plumes” of sulfolane, particularly in Alberta.
Dr. Erica Pensini, associate professor at Guelph’s school of engineering, says researchers are tracking how it is spreading in groundwater, work that could help identify risks to supplies of potable water.
She says the study suggests that naturally-occurring sulfates (salts) react with sulfolane in groundwater and its ability to “mix more thoroughly with water.”
“Sulfolane plumes travel faster with fewer sulfates, so we’re trying to clarify migration in the context of what can we do to tackle this contamination,” said Pensini in a news release.
“We’re also partnering up with hydrogeologists and eco-toxicologists to explore other aspects that we’re not directly exploring in our lab,” said Pensini.
What is sulfolane?
Sulfolane, introduced to the market in 1944 by Shell Oil, is “widely used” to remove hydrogen sulfide – a process better known as ‘sweetening’ – from sour gas at thousands of sites across Alberta.
Sulfolane is virtually invisible and doesn’t have a particularly strong smell, so it is nearly undetectable in bodies of water.
“In most cases, you would not notice its presence,” Pensini told CTV News in a statement.
According to a 2008 report by WorleyParsons Komex for Shell Energy Canada, sulfolane was first detected in groundwater in the 1980s and, in 1994, a monitoring program was put in place.
A regional sulfolane monitoring program, which began in 1998, detected sulfolane in off-site groundwater near Shell’s Waterton facility.
By 2007, Shell began actively working to remove sulfolane, building on a pilot project conducted in 2003 and 2004.
Nevertheless, Pensini says the toxicity of the chemical was not fully understood, so it was improperly disposed of.
“It was therefore released in aquifers by sour gas and sour oil processing plants. There were 5,250 plants in 2007 (in Alberta), based on official sources,” she said.
“Each of these plants could have released different amounts.”
According to the Canadian government, “the toxicological database for sulfolane is limited.”
“Overall, oral exposure to sulfolane in experimental animals was associated with immunological, renal and reproductive and developmental effects,” the government’s website reads.
Health Canada says the compound is not likely to accumulate in the human body, but that more than 0.3 milligrams of sulfolane per litre of drinking water is unacceptable.
“Health Canada establishes screening values for contaminants at the request of federal departments, provinces and territories (jurisdictions). These requests are usually made when there is a concern for human health because the presence of a contaminant is suspected or detected in local source water and that contaminant does not have an established limit in drinking water.”
The agency says there are no regulatory limits for sulfolane in other countries, but sulfolane groundwater contamination did prompt authorities in North Pole, Alaska, to include it in the U.S. National Toxicology Program.
Research into whether or not sulfolane poses a risk to human health is still ongoing, Pensini says, but some companies have already raised concerns.
“For example, Sigma Aldritch, a leading chemical supplier, lists this hazard in their (safety data sheets),” she told CTV News in a statement.
“There is sufficient evidence for its impact on fertility for these to be officially reported.”
Crews working on a decommissioned sour gas well in south Calgary in 2017. (Supplied/AER)
Shell working with University of Guelph
Shell Canada says it is aware of Pensini’s research and has been working with the University of Guelph since 2022.
“Shell believes a collaborative and cooperative approach with academia is key to improve environmental practices,” a Shell spokesperson wrote in an email to CTV News.
Shell, which has operated sour gas wells in the Foothills – Jumping Pound, Caroline and Waterton – for 70 years, says it has also worked with the Alberta Energy Regulator (AER) as well as stakeholders and landholders for the past 10 years.
In 2019, Shell sold those sour gas wells to Pieridae, but it is still responsible for “managing and remediating any impacts at the Waterton and Jumping Pound gas plants.”
Shell Canada did not admit that sulfolane poses a risk to human health, but said its work with the University of Guelph “is an important step in advancing the science.”
Rules in place for companies
According to the AER, the body that monitors companies in Alberta’s energy sector, there are 27,562 active sour gas wells in the province, a figure that does not include inactive, abandoned and reclaimed wells.
Many more are scheduled to be drilled, the AER said in a statement to CTV News.
In addition to other regulations, the agency says all facilities that process sour gas require approval under Alberta’s Environmental Protection and Enhancement Act (EPEA).
Contamination still present in Alberta groundwater
Pensini acknowledged that “practices have changed” when it comes to the handling of sulfolane.
“New sulfolane contamination is most probably less significant,” she said. “Filters contaminated with sulfolane are no longer being washed directly into aquifers.”
However, she adds that several decades’ worth of contamination is still present in Alberta’s groundwater.
Pensini says Canadian Light Source, a national research facility at the University of Saskatchewan, has been “instrumental” in understanding the spread of sulfolane.
“We can probe aspects that we couldn’t probe anywhere else, so it is really, really important to us for this research,” she said.
The team’s findings have been published in the journal Physics of Fluids.
The Alberta government says it’s aware of the study.
“Provincial groundwater monitoring has not detected any notable increases in sulfolane levels in groundwater,” said Ryan Fournier, press secretary for Environment Minister Rebecca Schulz, in a statement to CTV News.
Fournier says the government will be reviewing the study’s findings.
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