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DNA from 10,000-year-old “chewing gum” sheds light on teens’ Stone Age menu and oral health: “It must have hurt”

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DNA from a type of “chewing gum” used by teenagers in Sweden 10,000 years ago is shedding new light on the Stone Age diet and oral health, researchers said Tuesday.

The wads of gum are made of pieces of birch bark pitch, a tar-like black resin, and are combined with saliva, with teeth marks clearly visible.

They were found 30 years ago next to bones at the 9,700-year-old Huseby Klev archaeological site north of Sweden’s western city of Gothenburg, one of the country’s oldest sites for human fossils.

The hunter-gatherers most likely chewed the resin “to be used as glue” to assemble tools and weapons, said Anders Gotherstrom, co-author of a study published in the journal Scientific Reports.

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Photo from the excavation site Huseby Klev at the Swedish west coast. 

Bengt Nordquist


“This is a most likely hypothesis — they could of course have been chewed just because they liked them or because they thought that they had some medicinal purpose,” he told AFP.

The gum was typically chewed by both male and female adolescents.

“There were several chewing gum (samples) and both males and females chewed them. Most of them seem to have been chewed by teenagers,” Gotherstrom said. “There was some kind of age to it.”

A previous 2019 study of the wads of gum mapped the genetic profile of the individuals who had chewed it.

This time, Gotherstrom and his team of paleontologists at Stockholm University were able to determine, again from the DNA found in the gum, that the teenagers’ Stone Age diet included deer, trout and hazelnuts.

Traces of apple, duck and fox were also detected.

“If we do a human bone then we’ll get human DNA. We can do teeth and then we’ll get a little bit more. But here we’ll get DNA from what they had been chewing previously,” Gotherstrom said. “You cannot get that in any other way.”  

Identifying the different species mixed in the DNA was challenging, according to Dr. Andrés Aravena, a scientist at Istanbul University who spent a lot of time on the computer analyzing the data.

“We had to apply several computational heavy analytical tools to single out the different species and organisms. All the tools we needed were not ready to be applied to ancient DNA; but much of our time was spent on adjusting them so that we could apply them”, Aravena said in a statement.

The scientists also found at least one of the teens had serious oral health issues. In one piece chewed by a teenage girl, researchers found “a number of bacteria indicating a severe case of periodontitis,” a severe gum infection.

“She would probably start to lose her teeth shortly after chewing this chewing gum. It must have hurt as well,” said Gotherstrom.

“You have the imprint from the teenager’s mouth who chewed it thousands of years ago. If you want to put some kind of a philosophical layer into it, for us it connects artefacts, the DNA and humans,” he said.

In 2019, scientists constructed an image of a woman based on the DNA extracted from 5,700-year-old chewing gum. She likely had dark skin, brown hair and blue eyes, and hailed from Syltholm on Lolland, a Danish island in the Baltic Sea. Researchers nicknamed the woman “Lola.”

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Artistic reconstruction of Lola.

Tom Björklund


Researchers at the time said it was the first time an entire ancient human genome had been obtained from anything other than human bone.  

Sophie Lewis contributed to this report.



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80 people sick after attending LA Times food tasting festival

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80 people seriously ill after attending food festival in LA County


80 people seriously ill after attending food festival in LA County

03:04

Painful cramps, nausea and vomiting were some of the symptoms some attendees experienced after attending a food festival held to celebrate Southern California’s best restaurants. 

Mark Kapczynski was one of the 80 people who became sick after a norovirus outbreak. 

“It was pretty painful, probably the most painful experience I have ever had,” he said. 

Kapczynski is still recovering from catching the highly contagious stomach bug at a place he never expected. 

“Certainly never thought it was the 101 event — these restaurants are too good couldn’t possibly be that,” he said.   

Kapczynski said he and his wife attended the Los Angeles times 101 Best Restaurants event earlier this month, a food-tasting festival celebrating what the newspaper’s editors rank are the 101 best places to eat in Southern California. 

“We visited Providence, which I mean they are a world-class restaurant serving fresh oysters and clams with different sauces and I ended up having two plates very quickly,” Kapczynski said. 

Kapczynski said he felt bloated immediately after eating the oysters. By the next day, his symptoms got worse. 

“The abdomen pain has just had just had me curled up in a ball and tremendous chills — just couldn’t get comfortable,” he said. 

Kapczynski isn’t the only one who got sick from eating oysters. The LA County Department of Public Health is now investigating a norovirus outbreak. So far, they have identified 80 cases. Emergency room physician Dr. Ali Jamehdor said the illness isn’t a typical stomach bug. 

“Oysters seem to really hit patients hard when they come into the ER they’re very, very ill,” he said. “Vomiting, diarrhea, significant abdominal cramping and it’s all due to a bug called vibrio. It’s a very specific bacteria that’s specific to oysters and causes an illness that hits people very, very hard.”

Providence, one of LA’s most celebrated restaurants said the oysters came from farms near Vancouver, British Columbia, Canada. Health inspectors at the event signed off on all handling and serving regulations. 

“The nature of norovirus is such that it would be undetectable to the vendor, the restaurant or the health inspectors who were onsite given that norovirus does not affect the appearance, odor or flavor of the shellfish,” the restaurant wrote in a statement. 

The California Department of Public Health issued a statewide alert on Canadian oysters 10 days after the event. The warning said the shellfish could make people sick. 

KCAL News reached out to the LA Times but has not heard back yet. The FDA says people infected with the virus can experience symptoms for 12 to 48 hours.



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Thousands of Jews have left leave Israel since the October 7 attacks

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Leaving Israel is easier, Shira Z. Carmel thinks, by saying it’s just for now. But she knows better.

For the Israeli-born singer and an increasing number of relatively well-off Israelis, the Oct. 7, 2023 Hamas attack shattered any sense of safety and along with it, Israel’s founding promise: to be the world’s safe haven for Jews. That day, thousands of Hamas militants blew past the country’s border defenses, killed 1,200 Israelis and dragged 250 more into Gaza in a siege that caught the Israeli army by surprise and stunned a nation that prides itself on its military prowess. This time, during what became known as Israel’s 9/11, the army didn’t come for hours.

Ten days later, a pregnant Carmel, her husband and their toddler boarded a flight to Australia, which was looking for people in her husband’s profession. And they spun the explanation to friends and family as something other than permanent – “relocation” is the easier-to-swallow term – acutely aware of the familial strain and the shame that have shadowed Israelis who leave for good.


A look at the aid efforts inside Gaza amid the Israel-Hamas war

02:03

“We told them we’re going to get out of the line of fire for awhile,” Carmel said more than a year later from her family’s new home in Melbourne. “It wasn’t a hard decision. But it was very hard to talk to them about it. It was even hard to admit it to ourselves.”

Thousands of Israelis have left the country since Oct. 7, 2023, according to government statistics and immigration tallies released by destination countries such as Canada and Germany. There’s concern about whether it will drive a “brain drain” in sectors like medicine and tech. Migration experts say it’s possible people leaving Israel will surpass the number of immigrants to Israel in 2024, according to Sergio DellaPergola, a statistician and professor emeritus of Hebrew University in Jerusalem.

Thousands of Israelis have opted to pay the financial, emotional and social costs of moving out since the Oct. 7 attack, according to government statistics and families who spoke to The Associated Press in recent months after emigrating to Canada, Spain and Australia.

Israel’s population continues to grow toward 10 million people. But it’s possible that 2024 ends with more Israelis leaving the country than coming in. That’s even as Israel and Hezbollah reached a fragile ceasefire along the border with Lebanon and Israel and Hamas inch toward a pause in Gaza.

Israel’s Central Bureau of Statistics estimated in September that 40,600 Israelis departed long-term over the first seven months of 2024, a 59% increase over the same period a year earlier, when 25,500 people left. Monthly, 2,200 more people departed this year than in 2023, the bureau reported.

The Israeli Ministry of Immigration and Absorption, which does not deal with people leaving, said more than 33,000 people have moved to Israel since the start of the war, about on par with previous years. The interior minister refused to comment for this story, a spokesperson said.

Other clues, too, point to a notable departure of Israelis since the Oct. 7 attacks. Gil Fire, deputy director of Tel Aviv Sourasky Medical Center, said some of its star specialists with fellowship postings of a few years in other countries began to waver about returning.

“Before the war, they always came back and it was not really considered an option to stay. And during the war, we started to see a change,” he said. “They said to us, ‘We will stay another year, maybe two years, maybe more.'”

Fire says it’s “an issue of concern” enough for him to plan in-person visits with these doctors to try to draw them back to Israel.

Michal Harel, who moved with her husband to Toronto in 2019, said that almost immediately after the attacks, the phone began ringing – with other Israelis seeking advice about moving to Canada. On Nov. 23, 2023, the couple set up a website to help Israelis navigate moving, which can cost at least 100,000 Israeli shekels, or about $28,000, Harel and other Israeli relocation experts said.

Not everyone in Israel can just pack up and move overseas. Many of those who have made the move have foreign passports, jobs at multinational corporations or can work remotely. People in Gaza, where local health officials say more than 45,000 people have been killed, have even less choice. Harel reported that the site has received views from 100,000 unique visitors and 5,000 direct contacts in 2024 alone.

Aliya – the Hebrew term for used for immigration, literally the “ascent” of Jews into Israel – has always been part of the country’s plan. But “yerida” – the term used for leaving the country, literally the “descent” of Jews from Israel to the diaspora, emphatically has not.

A sacred trust and a social contract took root in Israeli society. The terms go – or went – like this: Israeli citizens would serve in the military and pay high taxes. In exchange, the army would keep them safe. Meanwhile, it’s every Jew’s obligation to stay, work and fight for Israel’s survival.

“Emigration was a threat, especially in the early years (when) there were problems of nation-building,” said Ori Yehudai, a professor of Israel studies at Ohio State University and the author of “Leaving Zion,” a history of Israeli emigration. “People still feel they have to justify their decision to move.”

Shira Carmel says she has no doubt about her decision. She’d long objected to Netanyahu’s government’s efforts to overhaul the legal system, and was one of the first women to don the blood-red “Handmaid’s Tale” robes that became a fixture of the the anti-government protests of 2023. She was terrified as a new mom, and a pregnant one, during the Hamas attack. This was not the life she wanted.

Meanwhile, Australia beckoned. Carmel’s brother had lived there for two decades. The couple had the equivalent of a green card due to Carmel’s husband’s profession. Basic logic, she says, pointed toward moving. They were able to catch a free flight out on seven hours’ notice.

And yet, Carmel recalls the frenzied hours before the flight out in which she said to her husband in the privacy of their bedroom: “My God, are we really doing this?”

They decided not to decide. They packed lightly. But weeks in Australia became months, and the couple decided to have the baby there. They told their families back in Israel that they were staying “for now.”

“We don’t define it as ‘forever,'” Carmel said on Tuesday. “But we are for sure staying for the foreseeable future.”



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Looking for a home in 2025? Check out these 10 housing hotspots.

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Although 2024 is winding down, the U.S. housing crisis lives on. But even as steep home prices and elevated mortgage rates sideline many would-be homebuyers, some real estate markets around the country continue to attract buyers.

The National Association of Realtors (NAR) this month released a list of 10 local housing markets it expects to be hot spots in 2025, outperforming the rest of the country in sales. The locations have been chosen by NAR based on their current individual strengths across 10 key economic, demographic and housing factors that are considered predictors of future market activity.

“Important factors common among the top-performing markets in 2025 include available inventory at affordable price points, a better chance of unlocking low mortgage rates, higher income growth for young adults and net migration into specific metro areas,” said Lawrence Yun, NAR chief economist and senior vice president of research, in the report.

One of those factors is the share of “locked-in” homeowners in a given area — those with low mortgage rates from previous years who are in no rush to sell and take on new loans at much higher rates. Areas with fewer locked-in homeowners were considered by NAR to be hotter than others as they are more likely to see properties listed. More listings means and more opportunities for buyers.  

Predictions for 2025

NAR expects mortgage rates to stabilize, if not fall as sharply as some house-hunters were hoping, next year. The Federal Reserve on Wednesday announced its third straight cut in its benchmark rate, lowering the federal funds rate by another quarter of a percentage point. Although mortgage rates don’t always mirror the Fed’s rate moves, they tend to track the yield on the 10-year Treasury note, rising or falling along with the return on government debt.

NAR thinks the Fed will continue to cut borrowing costs in 2025 and predicts that mortgage rates will settle around 6%, bringing in millions more buyers back to the market. The Fed is now hinting at only two rate cuts in 2025, down from its previous projection in September of four. Experts expect mortgage rates may come down slightly with the Fed’s the latest reduction possibly contributing to a modest decline

The real estate group also expects home prices to rise further in the coming year, though more slowly than in 2024. The number of homes on the market is  and will continue to increase in 2025. 

“Homebuyers will have more success next year,” Yun said in the report. “The worst of the affordability challenges are over as more inventory, stable mortgage rates and continued job and income growth pave the way for more Americans to achieve homeownership.”

Here, in alphabetical order, are NAR’s 10 top housing hot spots for 2025.

Boston-Cambridge-Newton, Massachusetts-New Hampshire

Fall Foliage Along The Charles
Fall foliage along the banks of the Charles River in Boston.

David L Ryan/The Boston Globe via Getty Images


Buying a home in Boston-Cambridge-Newton area isn’t exactly cheap, with home prices averaging $694,494, according to Zillow. That’s more than $200,000 north of the national average home price of $430,584.

Still, the metro area has a number of strengths. For one, NAR expects the local housing market, which includes portions of southern New Hampshire, next year to benefit from stabilizing mortgage rates, which would likely mean fewer locked-in homeowners. Mortgage rates in Boston typically skew lower than the national average, according to the real estate group, which noted that Boston also has a good number starter-homes. Typically priced at 85% of the median-priced home, starter homes are critical for first-time buyers. 

Charlotte-Concord-Gastonia, North Carolina-South Carolina

Fall Colors in Residential Neighborhood - Aerial
Drone shot of single family homes in the Dilworth neighborhood of Charlotte, North Carolina. 

Hal Bergman/Getty Images


In addition to 10% job growth over the last five years, Charlotte has a significant share of affordable housing, with 43% of homes priced below $324,000 — a huge draw for first-time buyers and young families. The average interest rate in the area is 6.85%, slightly below the national average of 6.89% for a 30-year fixed mortgage.

Grand Rapids-Kentwood, Michigan

Downtown Grand Rapids buildings and Grand River
High-rise office buildings of Downtown Grand Rapids, Michigan, with the Grand River in the foreground.

Getty Images/iStockphoto


Grand Rapids, Michigan, offers an ample stock of affordable homes, with the average home price at $271,96, while mortgage rates hover around 6.9%, slightly above the national average. But because Grand Rapids has a small proportion of mortgage originations with rates below 6%, NAR predicts fewer lock-ins and more listings in 2025.

Greenville-Anderson, South Carolina

Aerial View of Greenville, South Carolina during Autumn
Aerial View of Greenville, South Carolina during autumn.

Getty Images/iStockphoto


With home prices averaging $307,315 and a large influx of new residents, houses in Greenville don’t stay listed for long — typically about 17 days. Mortgage rates run just above the national average, at 6.9%, most likely because of recent foreclosures happening in the state, according to MorgageRates.com. 

NAR points to the 42% of homes categorized as starter homes in Greenville as another reason why it predicts the local housing market will be a standout for families and young professionals in 2025. 

Hartford-East-Hartford-Middletown, Connecticut

Tower Avenue in Hartford, Connecticut
Tower Avenue in Hartford, Connecticut, during December

Getty Images


When it comes to affordability, Hartford’s average home price of $178,696 is hard to beat. In 2023, The city’s average mortgage rate of 6.5% was one of the lowest among the top markets. Connecticut’s capital city also has the highest proportion of homeowners surpassing the area’s average tenure of 17 years, an indication of a potential increase in local inventory, according to NAR. 

Indianapolis-Carmel-Anderson, Indiana

Modern American Single Family Luxury Home in Indianapolis Indiana Suburb
A luxury home in an upscale subdivision in the suburbs of Indianapolis, Indiana.

Getty Images


Indianapolis made NAR’s list because of strong job growth and housing affordability. Nearly 42% of the housing stock is priced below $236,000, with the average home value at $223,261. “With fewer ‘locked-in’ homeowners than the national level, this area is likely to see more available inventory as mortgage rates stabilize around 6% next year,” according to NAR.

Kansas City, Missouri-Kansas

Downtown Kansas City
Union Station and skyline, Kansas City, Missouri

Getty Images


Kansas City’s generally lower average mortgage rate and smaller share of locked-in homeowners makes it a favorable market for financing and inventory. The average house is priced at $233,826, making homeownership in the area affordable for one in three millennials. Affordability plus competitive financing will make the Kansas City housing market a top performer in 2025, according to NAR.

Knoxville, Tennessee

Brightly Painted Row of Wood Frame Houses on Summer Day
A row of classic wood framed homes in Knoxville, Tennessee.

Marcia Straub/Getty Images


One of the hottest housing markets in Tennessee, Knoxville is a place where newcomers go to settle down — roughly 50% of movers to the area decide to buy a home, NAR says. The average value of a home in Knoxville is $350,614, making this city located in the foothills of the Great Smoky Mountains affordable compared with other major cities.

Phoenix-Mesa-Chandler, Arizona

New Homes in Arizona
Newly built single-family homes in Arizona.

Gregory Clifford/Getty Images


The average home value in Phoenix is $414,977. The relatively affordable housing stock, plus a comparatively lower cost of living and strong job growth, have made Arizona’s capital city a key destination for Californians looking to relocate. “Demographic shifts and economic expansion has established Phoenix as a prosperous and dynamic market,” according to NAR.

San Antonio-New Braunfels, Texas

San Antonio Texas USA
Skyline view of downtown San Antonio, Texas, at night.

Paul Giamou Photography Ltd./Getty Images


The average home in San Antonio is priced at $250,834, which makes it one of the few markets to see a decrease in residential real estate costs over the past year. The city, home of The Alamo, also has had one of the strongest records of job growth in the U.S. in recent years, according to the NAR report, and it continues to attract a steady influx of new residents.



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