For nearly 650 years, the fortress walls in the Chinese city of Xi’an have served as a formidable barrier around the central city. At 12 meters high and up to 18 meters thick, they are impervious to almost everything — except subatomic particles called muons.
Now, thanks to their penetrating abilities, muons may be key to ensuring that the walls that once protected the treasures of the first Ming Dynasty — and are now a national architectural treasure in their own right — stand for centuries more.
A refined detection method has provided the highest-resolution muon scans yet produced of any archaeological structure, researchers report in the Jan. 7 Journal of Applied Physics. The scans revealed interior density fluctuations as small as a meter across inside one section of the Xi’an ramparts. The fluctuations could be signs of dangerous flaws or “hidden structures archaeologically interesting for discovery and investigation,” says nuclear physicist Zhiyi Liu of Lanzhou University in China. Muons are like electrons, only heavier. They rain down all over the planet, produced when charged particles called cosmic rays hit the atmosphere. Although muons can travel deep into earth and stone, they are scattered or absorbed depending on the material they encounter. Counting the ones that pass through makes them useful for studying volcano interiors, scanning pyramids for hidden chambers and even searching for contraband stashed in containers impervious to X-rays (SN: 4/22/22).
Though muons stream down continuously, their numbers are small enough that the researchers had to deploy six detectors for a week at a time to collect enough data for 3-D scans of the rampart.
It’s now up to conservationists to determine how to address any density fluctuations that might indicate dangerous flaws, or historical surprises, inside the Xi’an walls.
Today’s red jungle fowl — the wild forebears of the domesticated chicken — are becoming more chickenlike. New research suggests that a large proportion of the wild fowl’s DNA has been inherited from chickens, and relatively recently.
Ongoing interbreeding between the two birds may threaten wild jungle fowl populations’ future, and even hobble humans’ ability to breed better chickens, researchers report January 19 in PLOS Genetics.
Red jungle fowl (Gallus gallus) are forest birds native to Southeast Asia and parts of South Asia. Thousands of years ago, humans domesticated the fowl, possibly in the region’s rice fields (SN: 6/6/22). “Chickens are arguably the most important domestic animal on Earth,” says Frank Rheindt, an evolutionary biologist at the National University of Singapore. He points to their global ubiquity and abundance. Chicken is also one of the cheapest sources of animal protein that humans have.
Domesticated chickens (G. gallus domesticus) were known to be interbreeding with jungle fowl near human settlements in Southeast Asia. Given the unknown impacts on jungle fowl and the importance of chickens to humankind, Rheindt and his team wanted to gather more details. Wild jungle fowl contain a store of genetic diversity that could serve as a crucial resource for breeding chickens resistant to diseases or other threats.
The researchers analyzed and compared the genomes — the full complement of an organism’s DNA — of 63 jungle fowl and 51 chickens from across Southeast Asia. Some of the jungle fowl samples came from museum specimens collected from 1874 through 1939, letting the team see how the genetic makeup of jungle fowl has changed over time.
Over the last century or so, wild jungle fowl’s genomes have become increasingly similar to chickens’. Between about 20 and 50 percent of the genomes of modern jungle fowl originated in chickens, the team found. In contrast, many of the roughly 100-year-old jungle fowl had a chicken-ancestry share in the range of a few percent.
The rapid change probably comes from human communities expanding into the region’s wilderness, Rheindt says. Most modern jungle fowl live in close vicinity to humans’ free-ranging chickens, with which they frequently interbreed.
Such interbreeding has become “almost the norm now” for any globally domesticated species, Rheindt says, such as dogs hybridizing with wolves and house cats crossing with wildcats. Pigs, meanwhile, are mixing with wild boars and ferrets with polecats. Wild populations that interbreed with their domesticated counterparts could pick up physical or behavioral traits that change how the hybrids function in their ecosystem, says Claudio Quilodrán, a conservation geneticist at the University of Geneva not involved with this research.
The effect is likely to be negative, Quilodrán says, since some of the traits coming into the wild population have been honed for human uses, not for survival in the local environment.
Wild jungle fowl have lost their genetic diversity as they’ve interbred too. The birds’ heterozygosity — a measure of a population’s genetic diversity — is now just a tenth of what it was a century ago.
“This result is initially counterintuitive,” Rheindt says. “If you mix one population with another, you would generally expect a higher genetic diversity.”
But domesticated chickens have such low genetic diversity that certain versions of jungle fowl genes are being swept out of the population by a tsunami of genetic homogeneity. The whittling down of these animals’ genetic toolkit may leave them vulnerable to conservation threats.
“Having lots of genetic diversity within a species increases the chance that certain individuals contain the genetic background to adapt to a varied range of different environmental changes and diseases,” says Graham Etherington, a computational biologist at the Earlham Institute in Norwich, England, who was not involved with this research.
A shallower jungle fowl gene pool could also mean diminished resources for breeding better chickens. The genetics of wild relatives are sometimes used to bolster the disease or pest resistance of domesticated crop plants. Jungle fowl genomes could be similarly valuable for this reason.
“If this trend continues unabated, future human generations may only be able to access the entirety of ancestral genetic diversity of chickens in the form of museum specimens,” Rheindt says, which could hamper chicken breeding efforts using the wild fowl genes.
Some countries such as Singapore, Rheindt says, have started managing jungle fowl populations to reduce interbreeding with chickens.
The worst procrastinators probably won’t be able to read this story. It’ll remind them of what they’re trying to avoid, psychologist Piers Steel says.
Maybe they’re dragging their feet going to the gym. Maybe they haven’t gotten around to their New Year’s resolutions. Maybe they’re waiting just one more day to study for that test.
Procrastination is “putting off to later what you know you should be doing now,” even if you’ll be worse off, says Steel, of the University of Calgary in Canada. But all those tasks pushed to tomorrow seem to wedge themselves into the mind — and it may be harming people’s health. In a study of thousands of university students, scientists linked procrastination to a panoply of poor outcomes, including depression, anxiety and even disabling arm pain. “I was surprised when I saw that one,” says Fred Johansson, a clinical psychologist at Sophiahemmet University in Stockholm. His team reported the results January 4 in JAMA Network Open.
The study is one of the largest yet to tackle procrastination’s ties to health. Its results echo findings from earlier studies that have gone largely ignored, says Fuschia Sirois, a behavioral scientist at Durham University in England, who was not involved with the new research.
For years, scientists didn’t seem to view procrastination as something serious, she says. The new study could change that. “It’s that kind of big splash that’s … going to get attention,” Sirois says. “I’m hoping that it will raise awareness of the physical health consequences of procrastination.”
Procrastinating may be bad for the mind and body Whether procrastination harms health can seem like a chicken-and-egg situation.
It can be hard to tell if certain health problems make people more likely to procrastinate — or the other way around, Johansson says. (It may be a bit of both.) And controlled experiments on procrastination aren’t easy to do: You can’t just tell a study participant to become a procrastinator and wait and see if their health changes, he says. Many previous studies have relied on self-reported surveys taken at a single time point. But a snapshot of someone makes it tricky to untangle cause and effect. Instead, in the new study, about 3,500 students were followed over nine months, so researchers could track whether procrastinating students later developed health issues.
On average, these students tended to fare worse over time than their prompter peers. They were slightly more stressed, anxious, depressed and sleep-deprived, among other issues, Johansson and colleagues found. “People who score higher on procrastination to begin with … are at greater risk of developing both physical and psychological problems later on,” says study coauthor Alexander Rozental, a clinical psychologist at Uppsala University in Sweden. “There is a relationship between procrastination at one time point and having these negative outcomes at the later point.”
The study was observational, so the team can’t say for sure that procrastination causes poor health. But results from other researchers also seem to point in this direction. A 2021 study tied procrastinating at bedtime to depression. And a 2015 study from Sirois’ lab linked procrastinating to poor heart health.
Stress may be to blame for procrastination’s ill effects, data from Sirois’ lab and other studies suggest. She thinks that the effects of chronic procrastinating could build up over time. And though procrastination alone may not cause disease, Sirois says, it could be “one extra factor that can tip the scales.”
No, procrastinators are not lazy Some 20 percent of adults are estimated to be chronic procrastinators. Everyone might put off a task or two, but chronic procrastinators make it their lifestyle, says Joseph Ferrari, a psychologist at DePaul University in Chicago, who has been studying procrastination for decades. “They do it at home, at school, at work and in their relationships.” These are the people, he says, who “you know are going to RSVP late.”
Though procrastinators may think they perform better under pressure, Ferrari has reported the opposite. They actually worked more slowly and made more errors than non-procrastinators, his experiments have shown. And when deadlines are slippery, procrastinators tend to let their work slide, Steel’s team reported last year in Frontiers in Psychology.
For years, researchers have focused on the personalities of people who procrastinate. Findings vary, but some scientists suggest procrastinators may be impulsive, worriers and have trouble regulating their emotions. One thing procrastinators are not, Ferrari emphasizes, is lazy. They’re actually “very busy doing other things than what they’re supposed to be doing,” he says.
In fact, Rozental adds, most research today suggests procrastination is a behavioral pattern.
And if procrastination is a behavior, he says, that means it’s something you can change, regardless of whether you’re impulsive.
Why procrastinators should be kind to themselves When people put off a tough task, they feel good — in the moment. Procrastinating is a way to sidestep the negative emotions linked to the task, Sirois says. “We’re sort of hardwired to avoid anything painful or difficult,” she says. “When you procrastinate, you get immediate relief.” A backdrop of stressful circumstances — say, a worldwide pandemic — can strain people’s ability to cope, making procrastinating even easier. But the relief it provides is only temporary, and many seek out ways to stop dawdling.
Researchers have experimented with procrastination treatments that run the gamut from the logistical to the psychological. What works best is still under investigation. Some scientists have reported success with time-management interventions. But the evidence for that “is all over the map,” Sirois says. That’s because “poor time management is a symptom not a cause of procrastination,” she adds.
For some procrastinators, seemingly obvious tips can work. In his clinical practice, Rozental advises students to simply put down their smartphones. Silencing notifications or studying in the library rather than at home can quash distractions and keep people on task. But that won’t be enough for many people, he says.
Hard-core procrastinators may benefit from cognitive behavioral therapy. In a 2018 review of procrastination treatments, Rozental found that this type of therapy, which involves managing thoughts and emotions and trying to change behavior, seemed to be the most helpful. Still, not many studies have examined treatments, and there’s room for improvement, he says.
Sirois also favors an emotion-centered approach. Procrastinators can fall into a shame spiral where they feel uneasy about a task, put the task off, feel ashamed for putting it off and then feel even worse than when they started. People need to short-circuit that loop, she says. Self-forgiveness may help, scientists suggested in one 2020 study. So could mindfulness training.
In a small trial of university students, eight weekly mindfulness sessions reduced procrastination, Sirois and colleagues reported in the January Learning and Individual Differences. Students practiced focusing on the body, meditating during unpleasant activities and discussed the best way to take care of themselves. A little self-compassion may snap people out of their spiral, Sirois says.
“You made a mistake and procrastinated. It’s not the end of the world,” she says. “What can you do to move forward?”
Mystery mummies from Central Asia have a surprising ancestry. These people, who displayed facial characteristics suggesting a European heritage, belonged to a local population with ancient Asian roots, a new study finds. Until now, researchers had pegged the mummified Bronze Age bunch as newcomers and debated about where in West Asia they originally came from.
Desert heat naturally mummified hundreds of bodies buried in western China’s Tarim Basin from roughly 4,000 to 1,800 years ago. Preserved remains of these people have been excavated since the 1990s (SN: 2/25/95). Those interred around 4,000 years ago belonged to the Xiaohe culture, a population that mixed animal herding with plant cultivation. Their boat-shaped coffins were unlike any others in the region. And preserved cheese, wheat, millet and clothes made from western Eurasian wool found in Xiaohe graves pointed to distant contacts or origins.
Archaeogeneticist Yinqiu Cui of Jilin University in Changchun, China, and an international team analyzed DNA from 13 Tarim Basin mummies from roughly 4,100 to 3,700 years ago and five other human mummies from the nearby Dzungarian Basin from around 5,000 to 4,800 years ago. Tarim people displayed Asian ancestry mainly traceable to hunter-gatherers who inhabited much of northern Eurasia more than 9,000 years ago. That finding suggests that the mummies belonged to a population that did not mate with outsiders for many millennia, the researchers report October 27 in Nature. No DNA links were found to western Eurasian herders from the Afanasievo culture (SN: 11/15/17), who some researchers have regarded as precursors of Xiaohe people.
A predominantly Afanasievo ancestry did appear in the Dzungarian individuals. Milk proteins found in dental tartar from seven Tarim mummies indicated that those people regularly consumed dairy products, a practice possibly learned from Afanasievo descendants in the Dzungarian Basin, the researchers say.
Terence Crawford will face his toughest challenge yet to retain his WBO welterweight belt.
Crawford has fended off Jose Benavidez Jr., Amir Khan, Egidijus Kavaliauskas and Kell Brook in four defenses of his belt, but on Saturday, the stakes will be raised as he faces Shawn Porter. Porter has, at various points in his career, held different welterweight belts. He has held the WBC-NABF title, the IBF title and the vacant WBC title in the welterweight class, but Porter has lost three times in his past 10 fights, leading to the loss of the belts.
The winner of this fight will leave Michelob Ultra Arena with a belt, but both are going to be coming away with a good deal of money for the fight. Here's a look at how much each will earn, as well as the fighters' net worth, ahead of the fight. Terence Crawford vs. Shawn Porter purse These two fighters will each be coming away with a comparable payday for Saturday's fight. According to ESPN, Crawford will make upwards of $6 million, while Porter will pocket at least $4 million.
What is Terence Crawford's net worth? Crawford's unblemished record does not yet accompany the lofty earnings. Celebrity Net Worth reports that Crawford has a net worth of $8 million.
What is Shawn Porter's net worth? Porter's payday on Saturday will be a boon to his net worth. According to Celebrity Net Worth, Crawford has a net worth of $5 million. Terence Crawford career record Nationality: American Born: Sept. 28, 1987 (34 years old) Height: 5-8 Reach: 74 inches Record: 37-0-0 (28 KOs) Shawn Porter career record Nationality: American Born: Oct. 27, 1987 (34 years old) Height: 5-7 Reach: 69.5 inches Record: 31-3-1 (17 KOs) We may earn an affiliate commission when you sign up for a streaming service through our links. Sporting News' affiliates have no influence over the editorial content included in this article.
Twenty-five years later, this much is clear: “Space Jam” was not our jam.
But since its debut on Nov. 15, 1996, the iconic movie to kids of the ’90s (looking at you, Ken Griffey III) has found its way into Sporting News’ world. Back in the day? Not so much.
In fact, the first and only mention of the movie in ’96 was in The Sporting News’ annual 100 Most Powerful (cover headline: “Mouse madness: Disney’s growing sports kingdom,” so at least, y’know, some things aged reasonably well).
Ranked No. 17 on the TSN 100 — sandwiched between a pair of commissioners, No. 16 Paul Tagliabue and No. 18 Gary Bettman, David Falk, agent for a certain Tune squad team captain, was described in capsule form:
“Michael Jordan’s $30 million, one-year deal was only a part of the $400 million in player contracts Falk’s (agency F.A.M.E.) negotiated last summer. Falk also was executive producer of ‘Space Jam.’” Next time “Space Jam” popped up in TSN’s pages was almost a year after its premiere, in the Sept. 1, 1997 issue in, of course, a baseball story.
The headline: How to survive a pennant race.
Nobody can live baseball 24 hours a day … Players, coaches and managers strongly advise leaving the game at the park. Those with young children have an advantage: They go home to a first job. Ken Griffey Jr. watches movies with his son, Trey. "We watch 'Space Jam,'" Griffey says. "My son asks me, 'Daddy, how come you can't disappear into the ground like Michael Jordan?’”
Now, in fairness to TSN, other sports flicks got scant mention if at all — even, for God’s sake, when The Sporting News its own self got a mention (shoutout to Susan Sarandon and “Bull Durham”!).
Also, in fairness, we eventually came around and the original “Space Jam” dotted Sporting News, to readers’ good fortune.
So on the 25th anniversary of The Sporting News ignoring “Space Jam,” here are five times SN didn’t:
Michael Jordan trash-talked extras on the set of 'Space Jam’
This 'Space Jam' honest trailer is here to destroy your childhood memories
Michael Jordan got ready for the Bulls' '95-96 season on the set of 'Space Jam'
Bill Murray wants some credit for setting up Michael Jordan's game-winning shot in 'Space Jam'
