Connect with us

SCIENCE

Ancient DNA gives rare snapshot of Neanderthal family ties

Published

on



NEW YORK (AP) — A new study suggests Neanderthals formed small, tightknit communities where females may have traveled to move in with their mates.

The research used genetic sleuthing to offer a rare snapshot of Neanderthal family dynamics — including a father and his teenage daughter who lived together in Siberia more than 50,000 years ago.

Researchers were able to pull DNA out of tiny bone fragments found in two Russian caves. In their study, published Wednesday in the journal Nature, they used the genetic data to map out relationships between 13 different Neanderthals and get clues to how they lived.

“When I work on a bone or two, it’s very easy to forget that these are actually people with their own lives and stories,” said study author Bence Viola, an anthropologist at the University of Toronto. “Figuring out how they’re related to each other really makes them much more human.”

Our ancient cousins, the Neanderthals, lived across Europe and Asia for hundreds of thousands of years. They died out around 40,000 years ago, shortly after our species, the Homo sapiens, arrived in Europe from Africa.

Scientists have only recently been able to dig around in these early humans’ DNA. New Nobel laureate Svante Paabo — who is an author on this latest study — published the first draft of a Neanderthal genome a little over a decade ago.

Since then, scientists have sequenced 18 Neanderthal genomes, said lead author Laurits Skov, a geneticist at the Max Planck Institute for Evolutionary Anthropology. But it’s rare to find bones from multiple Neanderthals from the same time and place, he said — which is why these cave discoveries were so special.

“If there was ever a chance to find a Neanderthal community, this would be it,” Skov said.

The caves, located in remote foothills above a river valley, have been a rich source of materials from stone tools to fossil fragments, Viola said. With their prime view of migrating herds in the valley below, researchers think the caves might have served as a short-term hunting stop for Neanderthals.

Archaeologists excavating the caves have found remains from at least a dozen different Neanderthals, Viola said. These remains usually come in small bits and pieces — “a finger bone here, a tooth there” — but they’re enough for scientists to extract valuable DNA details.

The researchers were able to identify a couple of relatives among the group. Along with the father and daughter, there was a pair of other relatives — maybe a boy and his aunt, or a couple of cousins.

Overall, the analysis found that everyone in the group had a lot of DNA in common. That suggests that at least in this area, Neanderthals lived in very small communities of 10 to 20 individuals, the authors concluded.

But not everyone in these groups stayed put, according to the study.

Researchers looked at other genetic clues from mitochondrial DNA, which is passed down on the mother’s side, and the Y chromosome, which is passed down on the father’s side.

The female side showed more genetic differences than the male side — which means females may have moved around more, Skov said. It’s possible that when a female Neanderthal found a mate, she would leave home to live with his family.

University of Wisconsin anthropologist John Hawks, who was not involved in the study, said the research was an exciting application of ancient DNA evidence, even as many questions remain about Neanderthal social structures and lifestyles.

Figuring out how early humans lived is like “putting together a puzzle where we have many, many missing pieces,” Hawks said. But this study means “somebody’s dumped a bunch more pieces on the table.”

Think your friends would be interested? Share this story!


SCIENCE

Ohio chemical disaster may hold long-term health risks – experts

Published

on



East Palestine residents remain “in constant contact” with toxic pollutants, a US scientist says

The pollutants in the air of East Palestine, Ohio, may pose long-term health risks, scientists from Texas A&M and Carnegie Mellon University claimed on Wednesday. Their assessment contrasts the US Environmental Protection Agency’s (EPA) assurance that the pollution does not pose an immediate health risk.

Dr. Albert Presto, an associate research professor at Carnegie Mellon University, told CNN on Wednesday that the situation in East Palestine was not an “immediate health concern” but that it could still pose long-term risks as the researchers had no way of telling how long the hazardous chemical concentration would persist. He added that the residents of the city were in “constant contact” with the pollutants and there was no clear understanding of what that level of exposure would mean for the population’s health.

The air in the Ohio city was contaminated in early February, after 38 cars of a Norfolk Southern freight train derailed and spilled out the hazardous materials they were carrying. The accident caused a fire that went on for multiple days and intensified the airborne spread of the chemical pollution, causing a mandatory evacuation of the nearby residents. The EPA has been conducting various tests and measurements in the affected area, claiming there was no immediate risk to the local population.

Another train derails after Ohio chemical spill

Texas A&M and Carnegie Mellon presented their independent assessment in a Twitter post last week. The scientists claim to have used data compiled by the EPA and found that nine of the 50 chemicals found in East Palestine’s air were above the norm for the region. In particular, the report singles out acrolein, a toxic substance used to control plants, algae, rodents and microorganisms.

The EPA responded to the claims in the report from the two universities by dismissing the perceived risks. A spokesperson for the agency told CNN on Monday that the report assumed “a lifetime of exposure, which is constant exposure over approximately 70 years” for the harmful effects to manifest. They added: “EPA does not anticipate levels of these chemicals will stay high for anywhere near that.”

Dr. Ivan Rusyn, the director of the Texas A&M University Superfund Research Center and part of the team that did the analysis, told CNN on Wednesday that “all sides were right” as both parties simply needed to keep monitoring the situation and “do a better job communicating the results.”

PLEASANT MUSIC FOR YOUR CAFE, BAR, RESTAURANT, SWEET SHOP, HOME

SUITABLE MUSIC FOR YOGA LOVERS

Think your friends would be interested? Share this story!


Continue Reading

SCIENCE

Seismologist behind Türkiye quake prediction issues another warning

Published

on



Dutch seismologist Frank Hoogerbeets, who rose to international prominence after predicting the devastating earthquakes in Türkiye and Syria last month, has said that the world could be hit with another major quake in the coming days.

Hoogerbeets, who makes his forecasts based on the motions of celestial bodies, published a video on YouTube on Monday in which he warned that “the first week of March is going to be extremely critical.”

“A convergence of critical planetary geometry around March 2 and 5 may result in large to very large seismic activity, possibly even a mega-thrust earthquake around March 3 and 4 and/or March 6 and 7,” the description to the clip read.

In the video itself, the seismologist claimed that the power of the supposed impending quake “may be well over 8 magnitude.”

The affected area could stretch thousands of kilometers, from the Kamchatka Peninsula and the Kuril Islands in Russia’s Far East, all the way down to the Philippines and Indonesia, Hoogerbeets said.

Costs from Türkiye’s massive quake rising

“I’m not exaggerating. I’m not trying to create fear. This is a warning,” insisted the scientist, who works at the Solar System Geometry Survey (SSGEOS).

The head of the Kamchatka branch of the Geophysical Survey of Russia’s Academy of Sciences, Danila Chebrov, has questioned Hoogerbeets’ predictions and described him as an “amateur.” The connection between the movements of the planets in the solar system and seismic activity on Earth “is rather weak, and it’s problematic to use it as the main prognostic tool,” Chebrov explained.

On February 3, Hoogerbeets issued a tweet that read: “Sooner or later there will be a magnitude 7.5 earthquake in this region (South-Central Turkey, Jordan, Syria, Lebanon).”

Three days later, a 7.8 magnitude quake struck Türkiye and Syria. The disaster has caused the deaths of more than 50,000 people, with powerful aftershocks continuing in the region to this day.

Dutch seismologist Hoogerbeets has made predictions down the years which didn’t come true. Commenting on his work earlier this month, Susan Hough of the US Geological Survey insisted that no scientist has “ever predicted a major earthquake.” Hough told NPR that the spot-on forecast for the quakes in Türkiye and Syria was just a coincidence. “It’s the stopped clock that’s right twice a day, basically,” she said.

PLEASANT MUSIC FOR YOUR CAFE, BAR, RESTAURANT, SWEET SHOP, HOME

SUITABLE MUSIC FOR YOGA LOVERS

Think your friends would be interested? Share this story!


Continue Reading

SCIENCE

Turkish quakes may be ‘rehearsal’ for big one in Istanbul – scientists

Published

on



A local newspaper cites experts warning of a potential catastrophe if an earthquake hits the country’s biggest city

Istanbul should prepare itself for a powerful quake, scientists and public figures have warned. This month’s disaster in southern Turkey, which claimed tens of thousands of lives, is a “rehearsal” for what could come next, they argued in the newspaper Hurriyet on Friday.

When the next Istanbul earthquake happens, the damage “will swallow everyone,” unless people drop their differences and work on improving the seismic resilience of the city, Turkish author Nedim Sener wrote.

He cited a risk assessment by Bogazici University’s quake research lab, which counted how many buildings would be impacted by an earthquake of 7.5+ magnitude in Türkiye’s most populous and economically vital hub. With almost 13,500 structures expected to be heavily damaged, and hundreds of thousands of others affected to a smaller degree, the loss of life would be greater than what the country has just experienced, Sener predicted.

Some Turkish officials, including Istanbul Mayor Ekrem Imamoglu, have voiced similar concerns. The head of the city administration said 90,000 structures were at risk of total collapse in case of a major earthquake, citing a fresh survey by his municipality.

Cost of Türkiye quake damage estimated

Speaking in a TV interview this week, Imamoglu criticized the central government for issuing an amnesty to some 317,000 buildings which failed to meet earthquake resilience codes. It meant that the owners were allowed to pay a fine rather than demolish their properties.

Istanbul is located near a tectonic fault line that passes under the Marmara Sea. The 1999 quake in Izmit, which killed over 17,000 people, struck some 80 kilometers east of the city center, and half that distance from its easternmost suburbs.

Turkish Seismologist Naci Gorur, from Istanbul Technical University, warned that the risk of a major quake hitting Istanbul in the near future was growing. The probability of a tremor measuring over 7 magnitude occurring near the city within 30 years has increased from 62% in the aftermath of the 1999 disaster to 80% now, he said during a TV appearance. The scientists cited calculations by Tom Parsons, a fellow researcher at the US Geological Survey.

The twin quakes on February 6 caused massive devastation in Türkiye and northern Syria. Their combined death toll is estimated at around 44,000, including over 38,000 on the Turkish side.

SUITABLE MUSIC FOR YOGA LOVERS

PLEASANT MUSIC FOR YOUR CAFE, BAR, RESTAURANT, SWEET SHOP, HOME

Think your friends would be interested? Share this story!


Continue Reading

FINANCE

POLITICS

OPINION

LIFE

Trending