Environmental experts are ringing alarm bells, saying decades-long climate and environmental changes in Sudan have exacerbated social and political instability, fueling the monthslong conflict in the country centered around access to land, water and other vital resources.

The current conflict in Sudan, rooted in global geopolitics and the historical legacy of the previous leadership of now-deposed authoritarian leader Omar al-Bashir, is increasingly being attributed to climate change.

In a May report, Practical Action, a Britain-based international development organization, highlighted the impact of climate change in Sudan, which includes the encroachment of the desert southward and a stark reduction in rainfall.

Akinyi Walender, Practical Action Africa director, underscored the consequences of climate change in Sudan, including heightened drought, extreme rainfall variability, depletion of water sources and desertification spanning millions of hectares of land.

Speaking to VOA via WhatsApp, Walender said the conversion of migratory routes and pastureland into farmland has significantly disrupted “the natural balance” and accelerated desertification.

The United Nations says desertification is the persistent degradation of dryland ecosystems by climate change and mainly human activities — unsustainable farming, mining, overgrazing and clear-cutting of land.

The U.N. Convention to Combat Desertification says approximately 65% of Sudan’s land is affected by desertification.

Walender said climate change and conflict in Sudan are caught in a destructive cycle, potentially worsening the situation in the East African nation.

“The effects of war, such as the destruction of infrastructure, displacement of communities, and the use of airstrikes and heavy artillery, intensify the environmental damage in Sudan,” she said.

The International Organization for Migration, the U.N.’s migration agency, says nearly 7.1 million people are internally displaced within Sudan, 3.8 million being newly displaced due to the country’s monthslong conflict between the paramilitary Rapid Support Forces and the Sudanese Armed Force.

Awadalla Hamid, an environmental conservation manager at Practical Action in Sudan’s North Darfur State, said human activities have taken a toll on natural resources and ecosystems, intensifying environmental degradation.

Hamid said the displacement of communities in Sudan has led to further environmental damage.

“As people are forced to flee their homes, they often settle in temporary camps or new areas, leading to uncontrolled land-use changes, overexploitation of resources and increased pressure on fragile environments,” Hamid said. “The influx of displaced populations can also result in deforestation, soil erosion and pollution.”

The U.N. Environment Program says environmental destruction during conflicts has a direct impact on public health due to air and water pollution. The use of airstrikes and heavy artillery, while causing immediate destruction, also results in long-term environmental consequences, the U.N says.

Walender said addressing the environmental consequences of conflict requires a holistic approach —peacebuilding, conflict resolution and sustainable environmental practices.

Swar Adam, who fled violence in South Darfur and currently resides in Kosti, White Nile State, Sudan, told VOA his displacement has left him unable to tend to his livestock, which is his livelihood.

“It is very difficult at the moment to go and identify your cattle in such a situation,” Adam said. “I am not sure if they are now being fed on good grazing land or not. This is the situation I am in now.”

This story originated in VOA English to Africa’s South Sudan In Focus Program.
…

your ads here!

India’s moon lander and rover, which made a historic landing on the south pole of the moon, have not “woken up” after being put in sleep mode earlier this month to survive the freezing lunar night temperatures.

Scientists at the Indian Space Research Organization have not succeeded in reestablishing communication with the Vikram lander and the Pragyan rover, which were part of India’s pioneering Chandrayaan-3 mission.

After the spacecraft soft-landed on the little-explored lunar south pole on Aug. 23 — five days after a Russian spacecraft on an identical mission crashed — the rover spent 10 days traveling more than 100 meters on the lunar surface gathering scientific data.

Tasked with “the pursuit of lunar secrets” by the ISRO, the spacecraft transmitted images and scientific data back to Earth and confirmed the presence of sulfur, iron, titanium and oxygen on the moon.

Before the sun set on the moon Sept. 2, ISRO scientists switched the rover to sleep mode to hibernate and protect the spacecraft’s sensitive components from the freezing lunar night conditions. The lander was switched to sleep mode on Sept. 4.

A lunar day and night each lasts a little over 14 Earth days. During the lunar night, the temperature on the moon can drop between minus 200 degrees Celsius and minus 250 degrees Celsius.

After switching the lander and rover to sleep mode, ISRO said in a statement that the rover had completed its first set of assignments — Chandrayaan-3 mission’s primary goal — and they were confident the spacecraft could survive the extreme lunar night.

The ISRO said that after the spacecraft reawakened Friday, the sun would shine on its solar panels, and its batteries would recharge. The agency also said that if the spacecraft did not reawaken it would “forever stay there as India’s lunar ambassador.”

In a Friday post on X, formerly known as Twitter, the ISRO scientists explained their attempts to reawaken the robotic explorers.

“Efforts have been made to establish communication with the Vikram lander and Pragyan rover to ascertain their wake-up condition. As of now, no signals have been received from them. Efforts to establish contact will continue,” ISRO said, raising doubts about whether communication with the spacecraft would be reestablished and the mission’s scientific exploration of the lunar surface would be resumed.

In its latest update on Chandrayaan-3, ISRO said it would continue attempting to make contact with the spacecraft at least until the lunar night begins Oct. 6.

The Chandrayaan-3 mission made India the fourth country in the world to land on the moon, and the first to reach the south pole region. The achievement, hailed as “a victory cry of a new India” by Prime Minister Narendra Modi, sparked a feeling of national pride among millions of Indians, who watched the touchdown of the spacecraft live on television. 
…

your ads here!

Half of the world’s children breathe air polluted by tobacco smoke, and about 51,000 children die each year from illnesses related to second-hand smoke. Lisa Schlein reports from Geneva about the World Health Organization’s call to schools to protect children from the harmful effects of tobacco.
…

your ads here!

The World Health Organization is calling on schools to protect children from the harmful health impacts of tobacco use by creating nicotine- and tobacco-free zones on their campuses.

Tobacco kills more than 8 million people every year, most in low- and middle-income countries, which account for about 80% of the world’s 1.3 billion tobacco users.

The United Nations health agency reports that roughly half of the world’s children breathe air polluted by tobacco smoke and that about 51,000 children die each year from illnesses related to secondhand smoke.

“Young people are not only threatened by secondhand smoke,” said Kerstin Schotte, medical officer at WHO, “they are also aggressively targeted by the tobacco and related industries and their deadly products.”

As more than half of all smokers die prematurely, and in a bid to keep profits high, she said, the tobacco industry “tries to replace all the customers they lose by recruiting new users.”

“Given that an overwhelming 90% of smokers pick up the habit before turning 18, teenagers become prime targets,” Schotte said.

She said one tactic employed by the tobacco industry to entice young people to become new users is through marketing addictive, sweet and fruity flavored nicotine products. She said, “These products are sold near schools, online and in vending machines, where age verification can be circumvented.”

She said the industry also has made its product more affordable for young people “through the sale of single-use vape sticks, as they are called. They usually do not bear any health warnings, and children often do not know that they contain nicotine and are dangerous.”

Ruediger Krech, WHO director of health promotion, said this is a problem throughout the world, in rich and poor countries alike. He noted that last month the U.S. Food and Drug Administration warned 15 online retailers to stop selling illegal e-cigarettes that are packaged to appeal to young people.

He said these dangerous products are being sold in class, at bus stops — everywhere young people congregate. “We must protect young people from deadly secondhand smoke and toxic e-cigarette emissions, as well as ads promoting these products,” he said.

E-cigarettes are marketed by the tobacco industry as products that help adult smokers quit the habit. However, medical officer Schotte said this isn’t proven science.

“We think there is not enough evidence to say for sure that these products can help smokers to quit,” she said. “If anything, we see another double use. The majority of smokers who try to quit smoking with these devices do not quit all products. But they just switch to these products.

“And our definition of quitting is not that you switch to another addictive product,” she said.

To counter this, the World Health Organization has launched a new guide and toolkit for school administrators and teachers about how to create tobacco- and nicotine-free schools. The guides provide best-practice examples of what countries, cities and schools have done to become tobacco and nicotine free.

“Schools are in a unique position to create this healthy tobacco- and nicotine-free environment because children spend a third of their waking time in schools,” Schotte said.

“This is the place where children encounter a lot of this peer pressure about using these products, and this is why it is important that schools provide this safe and healthy environment for children,” she said.

The WHO guide highlights four ways to promote a nicotine- and tobacco-free environment for young people. They include banning nicotine and tobacco products on school campuses, prohibiting the sale of e-cigarettes and other toxic commodities near schools, and banning the advertisement and promotion of tobacco products near schools. The guide also calls on schools to refuse sponsorships or engagement with tobacco and nicotine industries.

“We want children to be in a safe place,” Schotte said, “so schools should be completely smoke and nicotine free indoors.”

She noted that 149 countries already have put legislation in place prohibiting smoking inside educational facilities. She said the WHO guide also recommends turning the entire school campus — indoors and outdoors — into a smoke-free zone.

“We want to de-normalize the act of smoking in public places,” she said.
…

your ads here!

Deeply entrenched gender norms, biases and perceptions are affecting the ability of girls and young women to use the internet, influencing their online activity and hurting their access to information and work, a new report has found.

A survey of more than 10,000 users aged 14-21, and their parents, in over half a dozen countries including Ethiopia, Kenya, Nigeria, Tanzania and India, found that girls are constantly being monitored and told they are vulnerable and not competent online, “creating a crisis of confidence.”

“This is resulting in girls setting up more protections and behaving more conservatively when connecting with others and sharing personal information online,” said the report by nonprofit Girl Effect, the Malala Fund, the United Nations’ children’s agency UNICEF and the Vodafone Americas Foundation.

“These attitudes are not just impacting girls’ access and usage, they are influencing their self-confidence and shaping their own perceptions of their ability to use these tools to pursue their social, educational, and intellectual interests,” said the report.

The gender digital divide has persisted despite efforts by governments worldwide. A UNICEF study earlier this year showed that in 54 countries, the median gender parity ratio is 71, meaning that for every 100 adolescent boys and young men who use the internet, only 71 adolescent girls and young women do.

At the same time, women experience more online abuse, and harassment is driving girls to quit social media platforms such as Facebook and Instagram, recent studies have found.

Among digitally connected youth, 12% more girls than boys said that they feel self-conscious while using social media and are 11% less likely to post photos or comments online compared to boys of the same age, the report by Girl Effect found.

Vicious cycle

As girls’ exposure to the internet is restricted by biases and fear of abuse, they do not see themselves as tech-savvy, and do not see the internet as something that is for them, the report from Girl Effect said.

“This creates a vicious cycle whereby girls avoid tech because they don’t think it’s for them, and then tech is seen as ‘not for them’ because they have been avoiding it,” it said.

As teenagers who scrutinize, regulate and limit their behavior online, women “often carry these traits to their workplace, where they face difficulties in demonstrating their skills and building strategic connections,” said Mitali Nikore, a gender policy specialist at research group Nikore Associates.

“This negatively affects women’s behavior at workplaces, constraining their labor market opportunities and professional advancement … and their access to potential sources of revenue-generating activities,” Nikore told the Thomson Reuters Foundation.

Besides better smartphone access for girls and young women, digital literacy programs and an end to discrimination based on gender norms are needed, said Nikore.

Girls must also be involved in creating digital products for their needs, said a spokesperson for Girl Effect.

For example, Girl Effect developed artificial intelligence-enabled chatbots in South Africa and India — Big Sis and Bol Behen (“tell me, sister”) — with girls, as a source of accurate information on general health and sexual wellbeing for girls.

While new laws such as Britain’s Online Safety Act and the proposed Kids Online Safety Act in the United States can help protect children somewhat, “regulations can only go so far, and often lag behind technological advances,” the spokesperson for Girl Effect said.

“Adolescent girls and young women want to be involved in co-creating solutions; they have clear ideas for the functions, experiences, and strategies that could be applied to make the internet a safer, more accessible place.”
…

your ads here!

Sea ice that packs the ocean around Antarctica hit record low levels this winter, the U.S. National Snow and Ice Data Center (NSIDC) said Monday, adding to scientists’ fears that the impact of climate change at the southern pole is ramping up. 

Researchers warn the shift can have dire consequences for animals like penguins who breed and rear their young on the sea ice, while also hastening global warming by reducing how much sunlight is reflected by white ice back into space. 

Antarctic sea ice extent peaked this year on September 10, when it covered 16.96 million square kilometers (6.55 million square miles), the lowest winter maximum since satellite records began in 1979, the NSIDC said. That’s about 1 million square kilometers (about 621,371 square miles) less ice than the previous winter record set in 1986. 

“It’s not just a record-breaking year, it’s an extreme record-breaking year,” said NSIDC senior scientist Walt Meier. 

NSIDC in a statement said that the figures were preliminary with a full analysis to be released next month. 

Seasons are reversed in the Southern hemisphere with sea ice generally peaking around September near the end of winter and later melting to its lowest point in February or March as summer draws to a close. 

The summer Antarctic sea ice extent also hit a record low in February, breaking the previous mark set in 2022. 

The Arctic has been hit hard by climate change over the last decade, with sea ice rapidly deteriorating as the northern region warms four times faster than the global average. 

While climate change is contributing to melting glaciers in Antarctica, it has been less certain how warming temperatures are impacting sea ice near the southern pole. Sea ice extent there grew between 2007 and 2016. 

The shift in recent years toward record-low conditions has scientists concerned climate change may finally be presenting itself in Antarctic sea ice. 

While Meier cautioned it is too soon to say, an academic article published earlier this month in the journal Communications Earth and Environment pointed to climate change as a potential factor. 

The study found that warming ocean temperatures, driven mainly by human-caused greenhouse gas emissions, are contributing to the lower sea ice levels seen since 2016. 

“The key message here is that to protect these frozen parts of the world that are really important for a whole number of reasons,” said Ariaan Purich, a sea ice researcher at Australia’s Monash University who co-authored the study, “we really need to reduce our greenhouse gas emissions.” 
…

your ads here!

Outbreaks of dengue fever and acute watery diarrhea have “killed hundreds” in war-torn Sudan, medics reported on Monday, warning of “catastrophic spreads” that could overwhelm the country’s decimated health system. 

In a statement, the Sudanese doctors’ union warned that the health situation in the southeastern state of Gedaref, on the border with Ethiopia, “is deteriorating at a horrific rate,” with thousands infected with dengue fever. 

Although Gedaref has been spared the direct effects of the brutal war between the regular army and the paramilitary Rapid Support Forces (RSF), it has nonetheless been impacted by mass displacement and other humanitarian crises. 

More than five months into the war, 80% of the hospitals in Sudan are out of service, according to the United Nations. 

Even before the war, the fragile health care system struggled to contain the annual disease outbreaks that accompany the country’s rainy season starting in June, including malaria — endemic in Sudan — and dengue fever. 

This year, with Gedaref hosting upwards of 250,000 internally displaced persons, according to the U.N., the situation is much worse. 

“The hospital’s beds are all full, but the cases keep coming in, particularly children,” a medical source told AFP from Gedaref Hospital, requesting anonymity out of concern for his safety. 

“But the number of those receiving treatment at home are much more than those at the hospital,” he said. 

Gedaref resident Amal Hussein told AFP that “in each home, there are at least three people sick with dengue.” 

Dengue is a mosquito-borne disease that causes high fever, headaches, nausea, vomiting, muscle pain and, in the most serious cases, bleeding that can lead to death. 

Medics and the U.N. have repeatedly warned that the violence in Sudan, combined with the rainy season and devastated infrastructure, would cause disease outbreaks. 

More than 1,200 children have died in refugee camps since May, due in part to a measles outbreak, according to the U.N. refugee agency. 

‘Disaster is knocking’ 

In El Fasher, the capital of North Darfur state, “13 cases of malaria were reported in one week,” the health ministry said. 

In Khartoum, “three people died of acute watery diarrhea” — suspected cases of cholera — in the Hajj Youssef district in the east of the capital, the local resistance committee said on Monday. 

“Take precautions to avoid infection,” urged the committee — one of many that used to organize pro-democracy demonstrations before the war and that now volunteers to help those caught in the crossfire. 

Health crises have compounded the dire humanitarian situation in Sudan, where half of the population of 48 million relies on aid to survive and with 6 million on the brink of starvation, according to the U.N. 

Clementine Nkweta-Salami, the U.N.’s humanitarian representative in Sudan, warned on Monday that “disaster is knocking on the door in Sudan.” 

She urged “donors to immediately disburse pledged funds to sustain life-saving humanitarian aid.” 

By early September, the conflict between army chief Abdel Fattah al-Burhan and his former deputy, RSF commander Mohamed Hamdan Dagalo, had killed nearly 7,500 people, according to a conservative estimate by the Armed Conflict Location & Event Data Project. 

Dozens of hospitals have been bombed or occupied by fighters, in what the U.N. has called “cruel disregard for civilians.” 

The medics and aid workers who remain are themselves regularly targeted and their stocks looted as more people demand help.

The health ministry said on Monday RSF forces had seized control of the main medical supplies warehouse.

“Medicines and medical equipment amounting to $500 million have been lost,” ministry spokesman Haitham Mohamed Ibrahim said, adding that “70% of the equipment in specialized centers in Khartoum … has been lost.”

Even before the war, 1 in 3 Sudanese needed to walk more than an hour to gain access to medical care, and just 30% of vital medicines were available, according to the U.N. 
…

your ads here!

Kathleen Maxwell has lived in Phoenix for more than 20 years, but this summer was the first time she felt fear, as daily high temperatures soared to 110 degrees or hotter and kept it up for a record-shattering 31 consecutive days.

“It’s always been really hot here, but nothing like this past summer,” said Maxwell, 50, who last week opened her windows for the first time since March and walked her dog outdoors for the first time since May. “I was seriously scared. Like, what if this doesn’t end and this is how it’s going to be?”

Maxwell blames climate change, and she’s not alone.

New polling from The Associated Press-NORC Center for Public Affairs Research indicates that extreme weather, including a summer that brought dangerous heat for much of the United States, is bolstering Americans’ belief that they’ve personally felt the impact of climate change.

About 9 in 10 Americans (87%) say they have experienced at least one extreme weather event in the past five years — including drought, extreme heat, severe storms, wildfires or flooding — up from 79% who said that just a few months ago in April. And about three-quarters of those believe climate change is at least partly to blame.

In total, 64% of U.S. adults say both that they’ve recently experienced extreme weather and that they believe it was caused at least partially by climate change, up from 54% in April. And about 65% say climate change will have or already has had a major impact in their lifetime.

This summer’s heat might be a big factor: About three-quarters of Americans (74%) say they’ve been affected by extremely hot weather or extreme heat waves in the last five years, up from 55% in April — and of those, 92% said they’ve had that experience just in the past few months.

This summer was the hottest ever measured in the Northern Hemisphere, according to the World Meteorological Organization and the European climate service Copernicus.

Millions of Americans also were affected by the worst wildfire season in Canada’s history, which sent choking smoke into parts of the U.S. About six in 10 U.S. adults say haze or smoke from the wildfires affected them “a lot” (15%) or “a little” (48%) in recent months.

And around the world, extreme heat, storms, flooding and wildfires have affected tens of millions of people this year, with scientists saying climate change has made such events more likely and intense.

Anthony Leiserowitz, director of the Yale Program on Climate Change Communication, said researchers there have conducted twice-yearly surveys of Americans for 15 years, but it wasn’t until 2016 that they saw an indication that people’s experience with extreme weather was affecting their views about climate change. “And the signal has been getting stronger and stronger year by year as these conditions continue to get worse and worse,” he said.

But he also believes that media coverage of climate change has changed dramatically, and that the public is interpreting information in a more scientific way than they did even a decade ago.

Seventy-six-year-old Bruce Alvord, of Hagerstown, Maryland, said it wasn’t unusual to experience days with a 112-degree heat index this summer, and health conditions mean that “heat really bothers me because it’s restricted what I can do.”

Even so, the retired government worker doesn’t believe in human-caused climate change; he recalls stories from his grandparents about bad weather, and thinks the climate is fluctuating on its own. 

“The way the way I look at it is I think it’s a bunch of powerful politicians and lobbying groups that … have their agenda,” said Alvord, a Republican who sees no need to change his own habits or for the government to do more. “I drive a Chrysler 300 (with a V8 engine). I use premium gas. I get 15 miles a gallon. I don’t give a damn.”

The AP-NORC poll found significant differences between Democrats and Republicans. Among those who have experienced extreme weather, Democrats (93%) are more certain that climate change was a cause, compared to just half of Republicans (48%).

About 9 in 10 Democrats say climate change is happening, with nearly all of the remaining Democrats being unsure about whether climate change is happening (5%), rather than outright rejecting it. Republicans are split: 49% say climate change is happening, but 26% say it’s not and an additional 25% are unsure. Overall, 74% of Americans say climate change is happening, largely unchanged from April.

Republican Ronald Livingston, 70, of Clute, Texas, said he’s not sure if human activity is causing climate change, “but I know something is going on because we have been sweating our butts off.”

The retired history teacher said it didn’t rain for several months this year, killing his grass and drying up a slough on his property where he sometimes fishes. It was so hot — with 45 days of 100 degrees or more — that he could barely go outside, and he struggled to grow a garden. He also believes that hurricanes are getting stronger.

And after this summer, he’s keeping an open mind about climate change.

“It worries me to the extent that I don’t think we can go two or three more years of this,” Livingston said.

Jeremiah Bohr, an associate professor of sociology at the University of Wisconsin-Oshkosh who studies climate change communication, said scientific evidence “is not going to change the minds that haven’t already been changed.” But people might be swayed if people or institutions they already trust become convinced and spread the word, Bohr said.

After a brutal summer, Maxwell, the Phoenix resident, said she hopes more Americans will accept that climate change is happening and that people are making it worse, and support measures to slow it.

“It seems very, very obvious to me, with all of the extreme weather and the hurricanes and flooding,” said Maxwell. “I just can’t imagine that people wouldn’t.”
…

your ads here!

Neanderthals live on within us.

These ancient human cousins, and others called Denisovans, once lived alongside our early Homo sapiens ancestors. They mingled and had children. So some of who they were never went away — it’s in our genes. And science is starting to reveal just how much that shapes us.

Using the new and rapidly improving ability to piece together fragments of ancient DNA, scientists are finding that traits inherited from our ancient cousins are still with us now, affecting our fertility, our immune systems, even how our bodies handled the COVID-19 virus.

“We’re now carrying the genetic legacies and learning about what that means for our bodies and our health,” said Mary Prendergast, a Rice University archeologist.

In the past few months alone, researchers have linked Neanderthal DNA to a serious hand disease, the shape of people’s noses and various other human traits. They even inserted a gene carried by Neanderthals and Denisovans into mice to investigate its effects on biology, and found it gave them larger heads and an extra rib.

Much of the human journey remains a mystery. But Dr. Hugo Zeberg of the Karolinska Insitute in Sweden said new technologies, research and collaborations are helping scientists begin to answer the basic but cosmic questions: “Who are we? Where did we come from?”

And the answers point to a profound reality: We have far more in common with our extinct cousins than we ever thought.

Neanderthals within us

Until recently, the genetic legacy from ancient humans was invisible because scientists were limited to what they could glean from the shape and size of bones. But there has been a steady stream of discoveries from ancient DNA, an area of study pioneered by Nobel Prize winner Svante Paabo who first pieced together a Neanderthal genome.

Advances in finding and interpreting ancient DNA have allowed them to see things like genetic changes over time to better adapt to environments or through random chance.

It’s even possible to figure out how much genetic material people from different regions carry from the ancient relatives our predecessors encountered.

Research shows some African populations have almost no Neanderthal DNA, while those from European or Asian backgrounds have 1% to 2%. Denisovan DNA is barely detectable in most parts of the world but makes up 4% to 6% of the DNA of people in Melanesia, which extends from New Guinea to the Fiji Islands.

That may not sound like much, but it adds up: Even though only 100,000 Neanderthals ever lived, “half of the Neanderthal genome is still around, in small pieces scattered around modern humans,” said Zeberg, who collaborates closely with Paabo.

It’s also enough to affect us in very real ways. Scientists don’t yet know the full extent, but they’re learning it can be both helpful and harmful.

For example, Neanderthal DNA has been linked to auto-immune diseases like Graves’ disease and rheumatoid arthritis. When Homo sapiens came out of Africa, they had no immunity to diseases in Europe and Asia, but Neanderthals and Denisovans already living there did.

“By interbreeding with them, we got a quick fix to our immune systems, which was good news 50,000 years ago,” said Chris Stringer, a human evolution researcher at the Natural History Museum in London. “The result today is, for some people, that our immune systems are oversensitive, and sometimes they turn on themselves.”

Similarly, a gene associated with blood clotting believed to be passed down from Neanderthals in Eurasia may have been helpful in the “rough and tumble world of the Pleistocene,” said Rick Potts, director of the human origins program at the Smithsonian Institution. But today it can raise the risk of stroke for older adults. “For every benefit,” he said, “there are costs in evolution.”

In 2020, research by Zeberg and Paabo found that a major genetic risk factor for severe COVID-19 is inherited from Neanderthals. “We compared it to the Neanderthal genome and it was a perfect match,” Zeberg said. “I kind of fell off my chair.”

The next year, they found a set of DNA variants along a single chromosome inherited from Neanderthals had the opposite effect: protecting people from severe COVID.

The list goes on: Research has linked Neanderthal genetic variants to skin and hair color, behavioral traits, skull shape and Type 2 diabetes. One study found that people who report feeling more pain than others are likely to carry a Neanderthal pain receptor. Another found that a third of women in Europe inherited a Neanderthal receptor for the hormone progesterone, which is associated with increased fertility and fewer miscarriages.

Much less is known about our genetic legacy from Denisovans – although some research has linked genes from them to fat metabolism and better adaptation to high altitudes. Maanasa Raghavan, a human genetics expert at the University of Chicago, said a stretch of Denisovan DNA has been found in Tibetans, who continue to live and thrive in low-oxygen environments today.

Scientists have even found evidence of “ghost populations” — groups whose fossils have yet to be discovered — within modern humans’ genetic code.

So why did we survive?

In the past, the tale of modern humans’ survival “was always told as some success story, almost like a hero’s story,” in which Homo sapiens rose above the rest of the natural world and overcame the “insufficiencies” of their cousins, Potts said.

“Well, that simply is just not the correct story.”

Neanderthals and Denisovans had already existed for thousands of years by the time Homo sapiens left Africa. Scientists used to think we won out because we had more complex behavior and superior technology. But recent research shows that Neanderthals talked, cooked with fire, made art objects, had sophisticated tools and hunting behavior, and even wore makeup and jewelry.

Several theories now tie our survival to our ability to travel far and wide.

“We spread all over the world, much more than these other forms did,” Zeberg said.

While Neanderthals were specially adapted to cold climates, Potts said, Homo sapiens were able to disperse to all different kinds of climates after emerging in tropical Africa. “We are so adaptable, culturally adaptable, to so many places in the world,” he said.

Meanwhile, Neanderthals and Denisovans faced harsh conditions in the north, like repeated ice ages and ice sheets that likely trapped them in small areas, said Eleanor Scerri, an archeologist at Germany’s Max Planck Institute for Geoanthropology. They lived in smaller populations with a greater risk of genetic collapse.

Plus, we had nimble, efficient bodies, Prendergast said. It takes a lot more calories to feed stocky Neanderthals than comparatively skinny Homo sapiens, so Neanderthals had more trouble getting by, and moving around, especially when food got scarce.

Janet Young, curator of physical anthropology at the Canadian Museum of History, pointed to another intriguing hypothesis – which anthropologist Pat Shipman shared in one of her books –- that dogs played a big part in our survival. Researchers found the skulls of domesticated dogs in Homo sapiens sites much further back in time than anyone had found before. Scientists believe dogs made hunting easier.

By around 30,000 years ago, all the other kinds of hominins on Earth had died off, leaving Homo sapiens as the last humans standing.

‘Interaction and mixture’

Still, every new scientific revelation points to how much we owe our ancient cousins.

Human evolution was not about “survival of the fittest and extinction,” said John Hawks, a paleoanthropologist at the University of Wisconsin-Madison. It’s about “interaction and mixture.”

Researchers expect to learn more as science continues to advance, allowing them to extract information from ever-tinier traces of ancient lives. Even when fossils aren’t available, scientists today can capture DNA from soil and sediment where archaic humans once lived.

And there are less-explored places in the world where they hope to learn more. Zeberg said “biobanks” that collect biological samples will likely be established in more countries.

As they delve deeper into humanity’s genetic legacy, scientists expect to find even more evidence of how much we mixed with our ancient cousins and all they left us.

“Perhaps,” Zeberg said, “we should not see them as so different.”
…

your ads here!

The Great Lakes’ frigid fresh water used to keep shipwrecks so well preserved that divers could see dishes in the cupboards. Downed planes that spent decades underwater were left so pristine they could practically fly again when archaeologists finally discovered them.

Now, an invasive mussel is destroying shipwrecks deep in the depths of the lakes, forcing archeologists and amateur historians into a race against time to find as many sites as they can before the region touching eight U.S. states and the Canadian province of Ontario loses any physical trace of its centuries-long maritime history.

“What you need to understand is every shipwreck is covered with quagga mussels in the lower Great Lakes,” Wisconsin state maritime archaeologist Tamara Thomsen said. “Everything. If you drain the lakes, you’ll get a bowl of quagga mussels.”

Quagga mussels, finger-sized mollusks with voracious appetites, have become the dominant invasive species in the lower Great Lakes over the past 30 years, according to biologists.

The creatures have covered virtually every shipwreck and downed plane in all of the lakes except Lake Superior, archaeologists say. The mussels burrow into wooden vessels, building upon themselves in layers so thick they will eventually crush walls and decks. They also produce acid that can corrode steel and iron ships. No one has found a viable way to stop them.

Wayne Lusardi, Michigan’s state maritime archaeologist, is pushing to raise more pieces of a World War II plane flown by a Tuskegee airman that crashed in Lake Huron in 1944.

“Divers started discovering (planes) in the 1960s and 1970s,” he said. “Some were so preserved they could fly again. (Now) when they’re removed the planes look like Swiss cheese. (Quaggas are) literally burning holes in them.”

Quagga mussels, native to Russia and Ukraine, were discovered in the Great Lakes in 1989, around the same time as their infamous cousin species, zebra mussels. Scientists believe the creatures arrived via ballast dumps from transoceanic freighters making their way to Great Lakes ports.

Unlike zebra mussels, quaggas are hungrier, hardier and more tolerant of colder temperatures. They devour plankton and other suspended nutrients, eliminating the base level of food chains. They consume so many nutrients at such high rates they can render portions of the murky Great Lakes as clear as tropical seas. And while zebra mussels prefer hard surfaces, quaggas can attach to soft surfaces at greater depths, enabling them to colonize even the lakes’ sandy bottoms.

After 30 years of colonization, quaggas have displaced zebra mussels as the dominant mussel in the Great Lakes. Zebras made up more than 98% of mussels in Lake Michigan in 2000, according to the University of California, Riverside’s Center for Invasive Species Research. Five years later, quaggas represented 97.7%.

For wooden and metal ships, the quaggas’ success has translated into overwhelming destruction.

The mussels can burrow into sunken wooden ships, stacking upon themselves until details such as name plates and carvings are completely obscured. Divers who try to brush them off inevitably peel away some wood. Quaggas also can create clouds of carbon dioxide, as well as feces that corrode iron and steel, accelerating metal shipwrecks’ decay.

Quaggas have yet to establish a foothold in Lake Superior. Biologists believe the water there contains less calcium, which quaggas need to make their shells, said Dr. Harvey Bootsma, a professor at the University of Wisconsin-Milwaukee’s School of Freshwater Sciences.

That means the remains of the Edmund Fitzgerald, a freighter that went down in that lake during a storm in 1975 and was immortalized in the Gordon Lightfoot song, The Ballad of the Edmund Fitzgerald, are safe, at least for now.

Lusardi, Michigan’s state maritime archaeologist, ticked off a long list of shipwreck sites in the lower Great Lakes consumed by quaggas.

His list included the Daniel J. Morrel, a freighter that sank during a storm on Lake Huron in 1966, killing all but one of the 29 crew members, and the Cedarville, a freighter that sank in the Straits of Mackinac in 1965, killing eight crew members. He also listed the Carl D. Bradley, another freighter that went down during a storm in northern Lake Michigan in 1958, killing 33 sailors.

The plane Lusardi is trying to recover is a Bell P-39 that went down in Lake Huron during a training exercise in 1944, killing Frank H. Moody, a Tuskegee airman. The Tuskegee Airmen were a group of Black military pilots who received training at Tuskegee Army Air Field in Alabama during World War II.

Brendon Baillod, a Great Lakes historian based in Madison, has spent the last five years searching for the Trinidad, a grain schooner that went down in Lake Michigan in 1881. He and fellow historian Bob Jaeck finally found the wreck in July off Algoma, Wisconsin.

The first photos of the site, taken by a robot vehicle, showed the ship was in unusually good shape, with intact rigging and dishes still in cabins. But the site was “fully carpeted” with quagga mussels, Baillod said.

“It has been completely colonized,” he said. “Twenty years ago, even 15 years ago, that site would have been clean. Now you can’t even recognize the bell. You can’t see the nameboard. If you brush those mussels off, it tears the wood off with it.”

Quagga management options could include treating them with toxic chemicals; covering them with tarps that restrict water flow and starve them of oxygen and food; introducing predator species; or suffocating them by adding carbon dioxide to the water.

So far nothing looks promising on a large scale, UW-Milwaukee’s Bootsma said.

“The only way they will disappear from a lake as large as Lake Michigan is through some disease, or possibly an introduced predator,” he said.

That leaves archaeologists and historians like Baillod scrambling to locate as many wrecks as possible to map and document before they disintegrate under the quaggas’ assaults.

At stake are the physical remnants of a maritime industry that helped settle the Great Lakes region and establish port cities such as Milwaukee, Detroit, Chicago and Toledo, Ohio.

“When we lose those tangible, preserved time capsules of our history, we lose our tangible connection to the past,” Baillod said. “Once they’re gone, it’s all just a memory. It’s all just stuff in books.”
…

your ads here!

The World Health Organization says there is a global uptick in cholera cases.

The number of cases reported last year was more than double those reported in 2021, the United Nations agency said.

The number of countries reporting cholera statistics also grew in 2022 by 25%, from 35 countries in 2021 to 44 countries last year.

Cholera can be a life-threatening disease, according to the U.S. Centers for Disease Control and Prevention, that can spread through unsafe food or water.  Cholera bacteria can spread from a person to drinking water or water used to grow food or prepare food.  Cholera can also spread when human feces with cholera enter the water supply.

The standard treatment for cholera has been a two-dose vaccination, but beginning in October 2022, the International Coordinating Group that manages emergency vaccine supplies, switched to a single-dose vaccine.

Last year, there were large cholera outbreaks, the WHO said. Seven countries –Afghanistan, Cameroon, Democratic Republic of the Congo, Malawi, NIgeria, Somalia and Syria – reported more than 10,000 suspected and confirmed cholera cases.

The WHO said the world is on track this year to continue the cholera upsurge with outbreaks currently in 24 countries “with some countries in the midst of acute crises.”  
…

your ads here!

The climactic end of a seven-year voyage comes Sunday when a NASA capsule is to land in the Utah desert, carrying to Earth the largest asteroid samples ever collected.

Scientists have high hopes for the sample, saying it will provide a better understanding of the formation of our solar system and how Earth became habitable.

The Osiris-Rex probe’s final, fiery descent through Earth’s atmosphere will be perilous, but the U.S. space agency is hoping for a soft landing, around 9 a.m. local (15H00 GMT), in a military test range in northwestern Utah.

Four years after its 2016 launch, the probe landed on the asteroid Bennu and collected roughly nine ounces (250 grams) of dust from its rocky surface.

Even that small amount, NASA says, should “help us better understand the types of asteroids that could threaten Earth” and cast light “on the earliest history of our solar system,” NASA Administrator Bill Nelson said.

“This sample return is really historic,” NASA scientist Amy Simon told AFP. “This is going to be the biggest sample we’ve brought back since the Apollo moon rocks” were returned to Earth.

But the capsule’s return will require “a dangerous maneuver,” she acknowledged.

Osiris-Rex is set to release the capsule — from an altitude of more than 108,000 kilometers — about four hours before it lands.

The fiery passage through the atmosphere will come in the last 13 minutes, as the capsule hurtles downward at a speed of more than 43,453 kph, with temperatures of up to 2,760 Celsius.

Its rapid descent, monitored by army sensors, will be slowed by two successive parachutes. Should they fail to deploy correctly, a “hard landing” would follow.

If it appears that the target zone 60 by 15 kilometers might be missed, NASA controllers could decide at the last moment not to release the capsule.

The probe would then keep its cargo and make another orbit of the sun. Scientists would have to wait until 2025 before trying a new landing.

If it succeeds, however, Osiris-Rex would head toward a date with another asteroid.

Once the tire-sized capsule touches down in Utah, a team in protective masks and gloves will place it in a net to be airlifted by helicopter to a temporary “clean room” nearby.

NASA wants this done as quickly and carefully as possible to avoid any contamination of the sample with desert sands, skewing test results.

On Monday, assuming all goes well, the sample will be flown by plane to NASA’s Johnson Space Center in Houston, Texas. There, the box will be opened in another “clean room,” the beginning of a days-long process.

NASA plans to announce its first results at a news conference on Oct. 11.

Most of the sample will be conserved for study by future generations. Roughly one-fourth of it will be immediately used in experiments, and a small amount will be sent to Japan and Canada, partners in the mission.

Japan had earlier given NASA a few grains from the asteroid Ryugu, after bringing 5.6 grams of dust to Earth in 2020 during the Hayabusa-2 mission. Ten years before, it had brought back a microscopic quantity from another asteroid.

But the sample from Bennu is much larger, allowing for significantly more testing, Simon said.

Asteroids are composed of the original materials of the solar system, dating to some 4.5 billion years ago, and have remained relatively intact.

They “can give us clues about how the solar system formed and evolved,” said Osiris-Rex program executive Melissa Morris.

“It’s our own origin story,” she said.

By striking Earth’s surface, “we do believe asteroids and comets delivered organic material, potentially water, that helped life flourish here on Earth,” Simon said.

Scientists believe Bennu, which is 500 meters in diameter, is rich in carbon — a building block of life on Earth — and contains water molecules locked in minerals.

Bennu had surprised scientists in 2020 when the probe, during the few seconds of contact with the asteroid’s surface, had sunk into the soil, revealing an unexpectedly low density, sort of like a children’s pool filled with plastic balls.

Understanding its composition could come in handy in the distant future.

There is a slight, but non-zero, chance (one in 2,700) that Bennu could collide catastrophically with Earth, though not until 2182.

But NASA last year succeeded in deviating the course of an asteroid by crashing a probe into it in a test, and it might at some point need to repeat that exercise, but with much higher stakes. 
…

your ads here!

As Republican-led states have rushed to ban gender-affirming for minors, some families with transgender children found a bit of solace: At least they lived in states that would allow those already receiving puberty blockers or hormone therapy to continue.

But in some places, including Missouri and North Dakota, the care has abruptly been halted because medical providers are wary of harsh liability provisions in those same laws — one of multiple reasons that advocates say care has become harder to access even where it remains legal.

“It was a completely crushing blow,” said Becky Hormuth, whose 16-year-old son was receiving treatment from the Washington University Gender Center at St. Louis Children’s Hospital until it stopped the care for minors this month. Hormuth cried. Her son cried, too.

“There was some anger there, not towards the doctors, not toward Wash U. Our anger is towards the politicians,” she said. “They don’t see our children. They say the health care is harmful. They don’t know how much it helps my child.”

Since last year, conservative lawmakers and governors have prioritized restricting access to transgender care under the name of protecting children. At least 22 states have now enacted laws restricting or banning gender-affirming medical care for transgender minors. Most of the bans face legal challenges and enforcement on some of them has been put on hold by courts.

All the laws ban gender-affirming surgery for minors, although it is rare, with fewer than 3,700 performed in the U.S. on patients ages 12 to 18 from 2016 through 2019, according to a study published last month. It’s not clear how many of those patients were 18 when they received the surgeries.

There’s more variation, though, in how states handle puberty-blockers and hormone treatments under the new bans. Georgia’s law does not ban those for minors. The others do. But some states, including North Carolina and Utah, allow young people taking them already to continue. Others require the treatments to be phased out over time.

These treatments are accepted by major medical groups as evidence-based care that transgender people should be able to access.

James Thurow said the treatment at the Washington University center changed everything for his stepson, a 17-year-old junior at a suburban St. Louis high school who is earning As and Bs instead of his past Cs, has a girlfriend and a close group of friends.

“His depression, his anxiety had pretty much dissipated because he was receiving the gender-affirming care,” Thurow said. “He’s doing the best he’s ever done at school. His teachers were blown away at how quickly his grades shot up.”

For its part, the center said in a statement that it was “disheartened” to have to stop the care. Its decision followed a similar one from University of Missouri Health Care, where the treatment for minors stopped Aug. 28, the same day the law took effect.

Both blamed a section of the law that increased the liability for providers. Under it, patients can sue for injury from the treatment until they turn 36, or even longer if the harm continues past then. The law gives the health care provider the burden of proving that the harm was not the result of hormones or puberty-blocking drugs. And the minimum damages awarded in such cases would be $500,000.

Neither state Sen. Mike Moon, the Republican who was the prime sponsor of the Missouri ban, state Sen. Justin Brown nor state Rep. Dale Wright, whose committees advanced the measure, responded immediately to questions left Thursday by voicemail, email or phone message about the law’s intent.

In North Dakota, the law allows treatment to continue for minors who were receiving care before the law took effect in April. But it does not allow a doctor to switch the patient to a different gender dysphoria-related medication. And it allows patients to sue over injuries from treatment until they turn 48.

Providers there have simply stopped gender-affirming care, said Brittany Stewart, a lawyer at Gender Justice, which is suing over the ban in the state. “To protect themselves from criminal liability, they’ve just decided to not even risk it because that vague law doesn’t give them enough detail to understand exactly what they can and cannot do,” Stewart said.

Jasmine Beach-Ferrara, the executive director of the Campaign for Southern Equality, said it’s not just liability clauses that have caused providers to stop treatment.

Across the South, where most states have adopted bans on gender-affirming care for minors, she said she’s heard of psychologists who wrongly believe the ban applies to them and pharmacists who stop filling orders for hormones for minors, even in places where the laws are on hold because of court orders.

“It’s hard to overstate the level of kind of chaos and stress and confusion it’s causing on the ground,” she said, “particularly … for people who live in more rural communities or places where even before a law went into effect, it still took quite a bit of effort to get this care.”

Her organization is providing grants and navigation services to help children get treatment in states where it’s legal and available. That system is similar to networks that are helping women in states where abortion is not banned get care.

But there’s one key difference: gender-affirming care is ongoing. 

For 12-year-old Tate Dolney in Fargo, North Dakota, continuing care means traveling to neighboring Minnesota for medical appointments. “It’s not right and it’s not fair,” his mother, Devon Dolney, said at a news conference this month, “that our own state government is making us feel like we have to choose between the health and well-being of our child and our home.”

Hormuth’s son is on the waiting list for a clinic in Chicago, at least a five-hour drive away, but is looking at other options, too. Hormuth, a teacher, has asked also her principal to write a recommendation in case the family decides to move to another state.

“Should we have to leave?” she asked. “No one should have to have a plan to move out of state just because their kid needs to get the health care they need.”

In the meantime, the family did what many have: saving leftover testosterone from vials. They have enough doses stockpiled to last a year.
…

your ads here!

A 58-year-old man this week became the world’s second patient to receive a transplant of a genetically modified pig heart, the latest milestone in a growing field of medical research. 

Transplanting animal organs into humans, called xenotransplantation, could offer a solution to the chronic shortage of human organ donations. More than 100,000 Americans are currently on waiting lists for organ transplants. 

Both heart procedures were carried out by experts from the University of Maryland School of Medicine, with the first patient dying two months after his transplant last year due to “a multitude of factors including his poor state of health” prior to the operation, the university said in a statement Friday. 

‘Now I have hope’

The latest operation took place Wednesday with patient Lawrence Faucette. He was ineligible for a donated human heart due to pre-existing vascular disease and internal bleeding complications. 

Without the experimental transplant, the father of two and Navy veteran was facing near-certain heart failure. 

“My only real hope left is to go with the pig heart, the xenotransplant,” Faucette was quoted as saying prior to the procedure. “At least now I have hope, and I have a chance.” 

Following the transplant, Faucette was breathing on his own and the new heart was functioning well “without any assistance from supportive devices,” the university said. 

He was taking conventional anti-rejection drugs as well as receiving a new antibody therapy to prevent his body from damaging or rejecting the new organ. 

Transplanted pig kidney lasted 61 days

Xenotransplants are challenging because the patient’s immune system will attack the foreign organ. Scientists are trying to circumvent the problem by using organs from genetically modified pigs. 

In the past few years, doctors have transplanted kidneys from genetically modified pigs into brain-dead patients. 

The NYU Langone Hospital Transplant Institute in New York announced this month that a pig kidney transplanted into a brain-dead patient had functioned for a record-breaking 61 days. 

Early xenotransplantation research focused on harvesting organs from primates — for example, a baboon heart was transplanted into a newborn known as “Baby Fae” in 1984, but she survived only 20 days. 

Current efforts focus on pigs, which are thought to be ideal donors for humans because of their organ size, their rapid growth and large litters — and the fact they are already raised as a food source. 
…

your ads here!