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.” 
…

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. 
…

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.”
…

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.”
…

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.”
…

NASA’s first asteroid samples fetched from deep space parachuted into the Utah desert Sunday to cap a seven-year journey.

In a flyby of Earth, the Osiris-Rex spacecraft released the sample capsule from 63,000 miles (100,000 kilometers) out. The small capsule landed four hours later on a remote expanse of military land, as the mothership set off after another asteroid.

Scientists estimate the capsule holds at least a cup of rubble from the carbon-rich asteroid known as Bennu but won’t know for sure until the container is opened. Some spilled and floated away when the spacecraft scooped up too much and rocks jammed the container’s lid during collection three years ago.

Japan, the only other country to bring back asteroid samples, gathered about a teaspoon in a pair of asteroid missions.

The pebbles and dust delivered Sunday represent the biggest haul from beyond the moon. Preserved building blocks from the dawn of our solar system 4.5 billion years ago, the samples will help scientists better understand how Earth and life formed.

Osiris-Rex, the mothership, rocketed away on the $1 billion mission in 2016. It reached Bennu two years later and, using a long stick vacuum, grabbed rubble from the small roundish space rock in 2020. By the time it returned, the spacecraft had logged 4 billion miles (6.2 billion kilometers).

NASA’s recovery effort in Utah included helicopters as well as a temporary clean room set up at the Defense Department’s Utah Test and Training Range. The samples will be flown Monday morning to a new lab at NASA’s Johnson Space Center in Houston. The building already houses the hundreds of pounds (kilograms) of moon rocks gathered by the Apollo astronauts more than a half-century ago.

The mission’s lead scientist, Dante Lauretta of the University of Arizona, will accompany the samples to Texas. The opening of the container in Houston in the next day or two will be “the real moment of truth,” given the uncertainty over the amount inside, he said ahead of the landing.

Engineers estimate the canister holds 250 grams (8.82 ounces) of material from Bennu, plus or minus 100 grams (plus or minus 3.53 ounces). Even at the low end, it will easily surpass the minimum requirement of the mission, Lauretta said.

It will take a few weeks to get a precise measurement, said NASA’s lead curator Nicole Lunning.

NASA plans a public show-and-tell in October.

Currently orbiting the sun 50 million miles (81 million kilometers) from Earth, Bennu is about one-third of a mile (one-half of a kilometer) across, roughly the size of the Empire State Building but shaped like a spinning top. It’s believed to be the broken fragment of a much larger asteroid.

During a two-year survey, Osiris-Rex found Bennu to be a chunky rubble pile full of boulders and craters. The surface was so loose that the spacecraft’s vacuum arm sank a foot or two (0.5 meters) into the asteroid, sucking up more material than anticipated and jamming the lid.

These close-up observations may come in handy late in the next century. Bennu is expected to come dangerously close to Earth in 2182 — possibly close enough to hit. The data gleaned by Osiris-Rex will help with any asteroid-deflection effort, according to Lauretta.

Osiris-Rex is already chasing after the asteroid Apophis and will reach it in 2029.

This was NASA’s third sample return from a deep-space robotic mission. The Genesis spacecraft dropped off bits of solar wind in 2004, but the samples were compromised when the parachute failed, and the capsule slammed into the ground. The Stardust spacecraft successfully delivered comet dust in 2006.

NASA’s plans to return samples from Mars are on hold after an independent review board criticized the cost and complexity. The Martian rover Perseverance has spent the past two years collecting core samples for eventual transport to Earth.
…

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.”  
…

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. 
…

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.
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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. 
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About 76% of farmers are worried about the future impact of climate change, while 71% say it already has had an impact on their farms and incomes, a recent survey by life science company Bayer Group found.

Researchers interviewed 800 farmers in eight countries — Australia, Brazil, China, Germany, India, Kenya, Ukraine and the United States — and said that 568 of those farmers have witnessed the impact of climate change directly on their farms.

About 80% of them have experienced heat effects and anticipate reduced yields in the coming years.

Rodrigo Santos, president of the Crop Science Division at Bayer, said that despite the impact of climate change on farming communities, there will be more demand for food harvested from less land in the coming years.

“We need to produce 50% more food … with 20% less land per capita than we do today,” Santos said.

“Climate change for us, when we live in the cities, is one thing, but for the farmers it is impacting their yields, it’s impacting their production, it’s impacting their ability to produce food and feed,” he said.

The report said that 73% of farmers interviewed in Kenya, for instance, have faced drought. Persistent droughts in the East African nation have resulted in crop losses and livestock deaths.

The report highlights that 1 in every 6 farmers worldwide suffered a nearly 16% loss of income due to adverse weather conditions over the past two years.

Unpredictable weather patterns and insufficient seed varieties exacerbated food insecurity in Africa, according to experts.

The head of Africa Agribusiness International Finance Corp. at the World Bank, Yosuke Kotsuji, said the continent needs to adopt new farm technologies faster.

“The headache is how to scale technology dissemination,” he said. “The way you and I can farm — next door we can get quite different results.”

According to experts, older African farmers encounter difficulties when it comes to embracing technologies, unlike their younger counterparts on the continent.

Most farmers surveyed mentioned that they either currently implement or plan to adopt methods that reduce greenhouse gas emissions. Additionally, over 50% of them are striving to enhance biodiversity.

Doaa Abdel-Motaal, a senior counselor at the World Trade Organization, said there is a need to facilitate the easy movement of food in different countries to fight food insecurity.

“We also need to take into account the fact that the climate crisis is progressing and there will be more climate calamities, unfortunately, in different parts of the globe,” Abdel-Motaal said. “So allowing food to move from country A to country B to counter those calamities so that countries don’t starve is absolutely essential.

“Where countries find themselves on the map is no more than an accident of geography. There are some countries that are completely dependent on imported food for their food security,” he said.

Farmers worry about escalating fertilizer costs, energy prices and fluctuations in prices and income, the report said.
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U.N. member nations Friday approved a “political declaration” that establishes a plan to end tuberculosis around the world in the next five years.

The plan, engineered by the World Health Organization (WHO), was approved during the U.N. General Assembly’s high-level meeting on tuberculosis in New York. It sets a goal that includes reaching 90% of the world’s population with TB prevention services, using a WHO-recommended TB rapid test for initial diagnosis, and licensing at least one new TB vaccine by 2027.

WHO Director-General Tedros Adhanom Ghebreyesus – who led the meeting – says many of the targets established at the first high-level tuberculosis meeting in 2018 were not met, mainly because of the COVID-19 pandemic.

He says the goal of treating 44 million people with TB fell short by about 10 million people, and the goal of reaching 30 million people with preventive treatment fell short by about half.

The target of funding providing $2 billion for research also fell short by about half between 2018 and 2020.

TB remains one of the world’s most deadly infectious diseases, the WHO chief says, killing more than a million people a year while infecting more than 10 million.

Tedros says there are also about 500,000 drug-resistant TB cases each year.

The WHO reports new cases and deaths from TB rose between 2020 and 2021 – the peak years of the pandemic – but adds that coordinated efforts since then have seen some improvement in the numbers.

As it did with COVID-19 during the pandemic, the WHO has also launched a TB vaccine accelerator program designed to speed up the development, testing and authorization of new TB vaccines.

The WHO says there is currently only one licensed TB vaccine, and while it has proved to be moderately effective in preventing severe TB in infants, it inadequately protects adolescents and adults, who account for 90% of TB transmission globally.
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Fall is in the air — officially.

The equinox arrives on Saturday, marking the start of the fall season for the Northern Hemisphere.

But what does that actually mean? Here’s what to know about how we split up the year using the Earth’s orbit.

What is the equinox?

As the Earth travels around the sun, it does so at an angle.

For most of the year, the Earth’s axis is tilted either toward or away from the sun. That means the sun’s warmth and light fall unequally on the northern and southern halves of the planet.

During the equinox, the Earth’s axis and its orbit line up so that both hemispheres get an equal amount of sunlight.

The word equinox comes from two Latin words meaning equal and night. That’s because on the equinox, day and night last almost the same amount of time — though one may get a few extra minutes, depending on where you are on the planet.

The Northern Hemisphere’s spring — or vernal — equinox can land between March 19 and 21, depending on the year. Its fall – or autumnal — equinox can land between Sept. 21 and 24.

What is the solstice?

The solstices mark the times during the year when the Earth is seeing its strongest tilt toward or away from the sun. This means the hemispheres are getting very different amounts of sunlight — and days and nights are at their most unequal.

During the Northern Hemisphere’s summer solstice, the upper half of the Earth is tilted in toward the sun, creating the longest day and shortest night of the year. This solstice falls between June 20 and 22.

Meanwhile, at the winter solstice, the Northern Hemisphere is leaning away from the sun — leading to the shortest day and longest night of the year. The winter solstice falls between December 20 and 23.

What’s the difference between meteorological and astronomical seasons?

These are just two different ways to carve up the year.

Meteorological seasons are defined by the weather. They break down the year into three-month seasons based on annual temperature cycles. By that calendar, spring starts on March 1, summer on June 1, fall on Sept. 1 and winter on Dec. 1.

Astronomical seasons depend on how the Earth moves around the sun.

Equinoxes, when the sun lands equally on both hemispheres, mark the start of spring and autumn. Solstices, when the Earth sees its strongest tilt toward or away from the sun, kick off summer and winter.
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Australian Prime Minister Anthony Albanese Thursday announced the government will conduct a yearlong inquiry into the country’s approach to COVID-19, but opposition politicians say the limited scope and powers of the inquiry will make it “a complete waste of time.”   

International border closures made Australia a fortress for much of the pandemic.  It had some of the world’s longest and toughest lockdowns.

Australian efforts to contain the virus were some of the most restrictive in the world, with residents of Melbourne spending more time in lockdowns than almost any other urban area. 

An inquiry, announced by Prime Minister Anthony Albanese will look at the health and economic issues raised by the COVID-19 pandemic and bureaucratic obstacles to responding to it. 

Three independent experts, to be appointed by the government, will examine vaccinations, the availability of personal protective equipment and public health campaigns as well as financial support for businesses and individuals.   

Albanese told reporters Thursday that an independent inquiry will help to prepare Australia for the next pandemic.

“It was a time where Australians joined together,” said Albanese. “They made sacrifices. We need to examine what went right, what could be done better with a focus on the future because the health experts and the science tells us that this pandemic is not likely to be the last one.”

The federal inquiry follows up to 20 other state probes into COVID-19 in Australia.

Experts hope the new inquiry will provide a comprehensive nationwide assessment of Australia’s response to the pandemic.

Nancy Baxter, head of the School of Population and Global Health at the University of Melbourne, told the Australian Broadcasting Corp. Australia must be prepared for the next global virus outbreak.

“The focus of this should be on what we do differently in the next pandemic or what we do similarly,” said Baxter. “We need to learn.  Unfortunately, we will likely face another pandemic in our lifetime and so we need to be able to face that in a better way than we did COVID-19.”  

Only federal government decisions, not those of state and territory authorities, will be scrutinized.  Opposition lawmakers have said the probe therefore will not go far enough.  

Albanese has not said whether the inquiry would have powers to force political leaders to testify. 

The expert panel has been given a year for its work. 

Over the past week, more than 5,000 cases were reported across the country, according to official data but Australian authorities say the virus’s impact on the health system is fading.   
…

Kai Koerber was a junior at Marjory Stoneman Douglas High School when a gunman killed 14 students and three staff members there on Valentine’s Day in 2018.

Seeing his peers — and himself — struggle with returning to normal, he wanted to do something to help people manage their emotions on their own terms.

While some of his classmates at the Parkland, Florida, school have worked on advocating for gun control, entered politics or simply taken a step back to heal and focus on their studies, Koerber’s background in technology — he’d originally wanted to be a rocket scientist — led him in a different direction: to build a smartphone app.

The result was Joy: AI Wellness Platform, which uses artificial intelligence to suggest bite-sized mindfulness activities for people based on how they are feeling. The algorithm Koerber’s team built is designed to recognize how people feel from the sounds of their voices — regardless of the words or language they speak.

“In the immediate aftermath of the tragedy, the first thing that came to mind after we’ve experienced this horrible, traumatic event — how are we going to personally recover?” he said. “It’s great to say OK, we’re going to build a better legal infrastructure to prevent gun sales, increased background checks, all the legislative things. But people really weren’t thinking about … the mental health side of things.”

Like many of his peers, Koerber said he suffered from post-traumatic stress disorder for a “very long time” and only recently has it gotten a little better.

“So, when I came to Cal, I was like, ‘Let me just start a research team that builds some groundbreaking AI and see if that’s possible,’” said the 23-year-old, who graduated from the University of California at Berkeley earlier this year. “The idea was to provide a platform to people who were struggling with, let’s say sadness, grief, anger … to be able to get a mindfulness practice or wellness practice on the go that meets our emotional needs on the go.”

He said it was important to offer activities that can be done quickly, sometimes lasting just a few seconds, wherever the user might be.

Mohammed Zareef-Mustafa, a former classmate of Koerber’s who’s been using the app for a few months, said the voice-emotion recognition part is “different than anything I’ve ever seen before.”

“I use the app about three times a week, because the practices are short and easy to get into. It really helps me quickly de-stress before I have to do things, like job interviews,” he said.

To use Joy, you simply speak into the app. The AI is supposed to recognize how you are feeling from your voice, then suggest short activities.

It doesn’t always get your mood right, so it’s possible to manually pick your disposition. Let’s say you are feeling “neutral” at the moment. The app suggests several activities, such as 15-second exercise called “mindful consumption” that encourages you to “think about all the lives and beings involved in producing what you eat or use that day.”

Yet another activity helps you practice making an effective apology. Feeling sad? A suggestion pops up asking you to track how many times you’ve laughed over a seven-day period and tally it up at the end of the week to see what moments gave you a sense of joy, purpose or satisfaction.

The iPhone app is available for an $8 monthly subscription, with a discount if you subscribe for a whole year. It’s a work in progress, and as it goes with AI, the more people use it, the more accurate it becomes.

A plethora of wellness apps on the market claim to help people with mental health issues, but it’s not always clear whether they work, said Colin Walsh, a professor of biomedical informatics at Vanderbilt University who has studied the use of AI in suicide prevention. According to Walsh, it is feasible to take someone’s voice and glean some aspects of their emotional state.

“The challenge is if you as a user feel like it’s not really representing what you think your current state is like, that’s an issue,” he said. “There should be some mechanism by which that feedback can go back.”

The stakes also matter. Facebook, for instance, faced criticism for its suicide prevention tool, which used AI (as well as humans) to flag users who may be contemplating suicide, and — in some serious cases — contact law enforcement to check on the person. But if the stakes are lower, Walsh said, if the technology is simply directing someone to spend some time outside, it’s unlikely to cause harm.

Koerber said people tend to forget, after mass shootings, that survivors don’t just “bounce back right away” from the trauma they experienced. It takes years to recover.

“This is something that people carry with them, in some way, shape or form, for the rest of their lives,” he said.
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