Monday, August 07, 2023

Facial recognition technology should be regulated, but not banned

By Tony Porter, Chief Privacy Officer, Corsight AI, and Dr Nicole Benjamin Fink, Founder, Conservation Beyond Borders
The opinions expressed in this article are those of the author and do not represent in any way the editorial position of Euronews.

The European Commission has proven itself to be an effective regulator in the past. A blanket ban on FRT in law enforcement will only benefit the criminals, Tony Porter and Dr Nicole Benjamin Fink write.

The EU’s AI Act passed a major hurdle in mid-June when the bloc’s lawmakers greenlit what will be the world’s first rules on artificial intelligence. 

But one proposal stands apart: a total ban on facial recognition technology, or FRT. 

If left to stand, this rule will blindfold the law enforcers who do vital work to protect the most vulnerable in society. It will embolden criminal groups such as those who traffic wildlife and human victims, thereby putting lives at risk.

All surveillance capabilities intrude on human rights to some extent. The question is whether we can regulate the use of FRT effectively to mitigate any impact on these rights. 

Protecting privacy versus protecting people is a balance EU lawmakers can and must strike. A blanket ban is the easy, but not the responsible option.

Privacy concerns should face a reality check

MEPs voted overwhelmingly in favour of a ban on the use of live FRT in publicly accessible spaces, and a similar ban on the use of “after the event” FRT unless a judicial order is obtained. 

Now attention has shifted to no doubt heated trilogue negotiations between the European Parliament, European Council and member states.

FRT in essence uses cameras powered by AI algorithms to analyse a person’s facial features, potentially enabling authorities to match individuals against a database of pre-existing images, in order to identify them. 

Privacy campaigners have long argued that the potential benefits of using such tech are not worth the negative impact on human rights. But many of those arguments don’t stand up to scrutiny.

Activists demonstrate in front of a mobile police facial recognition facility outside a shopping centre in London, February 2020Kelvin Chan/AP

Privacy campaigners have long argued that the potential benefits of using such tech are not worth the negative impact on human rights. But many of those arguments don’t stand up to scrutiny. in fact, they’re based on conclusively debunked myths.

The first is that the tech is inaccurate and that it disproportionately disadvantages people of colour. 

That may have been true of very early iterations of the technology, but it certainly isn’t today. Corsight has been benchmarked by the US National Institute of Standards and Technology (NIST) to an accuracy rate of 99.8%, for example. 

Separately, a 2020 NIST report claimed that FRT performs far more effectively across racial and other demographic groups than widely reported, with the most accurate technologies displaying “undetectable” differences between groups.

It's also falsely claimed that FRT is ineffective. In fact, Interpol said in 2021 that it had been able to identify almost 1,500 terrorists, criminals, fugitives, persons of interest and missing persons since 2016 using FRT. That figure is expected to have risen exponentially since.

A final myth, that FRT intrudes on human rights as enshrined by the European Convention of the same name, was effectively shot down by the Court of Appeal in London. In that 2020 case, judges ruled that scanning faces and instantly deleting the data if a match can’t be found has a negligible impact on human rights.

It's about stopping the traffickers

On the other hand, if used in compliance with strict regulations, high-quality FRT has the capacity to save countless lives and protect people and communities from harm. 

Human trafficking is a trade in misery which enables sexual exploitation, forced labour and other heinous crimes. It’s estimated to affect tens of millions around the world, including children. 

But if facial images of known victims or traffickers are caught on camera, police could be alerted in real-time to step in. 

Given that traffickers usually go to great lengths to hide their identity, and that victims — especially children — rarely possess official IDs, FRT offers a rare opportunity to make a difference.

A man from Syria looks out at sea after being rescued 45 nautical miles far away from the Libyan coast, March 2022AP Photo/Andoni Lubaki

Given that traffickers usually go to great lengths to hide their identity, and that victims — especially children — rarely possess official IDs, FRT offers a rare opportunity to make a difference.

Wildlife trafficking is similarly clandestine. It’s a global trade estimated many years ago at €20.9 billion — the world’s fourth biggest illegal activity behind arms, drugs and human trafficking. 

With much of the trade carried out by criminal syndicates online, there’s a potential evidence trail if investigators can match facial images of trafficked animals to images posted later to social media. 

Buyers can then be questioned as to whom they procured a particular animal from. Apps are already springing up to help track wildlife traffickers in this way.

There is a better way forward

Given what’s at stake here, European lawmakers should be thinking about ways to leverage a technology proven to help reduce societal harm — but in a way that mitigates risks to human rights. 

The good news is that it can be done with the right regulatory guardrails. In fact, the EU’s AI Act already provides a great foundation for this, by proposing a standard of excellence for AI technologies which FRT could be held to.

Building on this, FRT should be retained as an operation tool wherever there’s a “substantial” risk to the public and a legitimate basis for protecting citizens from harm.

[FRT's] use should always be necessary and proportionate to that pressing need, and subject to a rigorous human rights assessment.

A member of the cleaning crew sanitises desks at the European Parliament in Brussels, September 2020AP Photo/Francisco S

Its use should always be necessary and proportionate to that pressing need, and subject to a rigorous human rights assessment. 

Independent ethical and regulatory oversight must of course be applied, with a centralized supervisory authority put in place. And clear policies should be published setting out details of the proposed use. 

Impacted communities should be consulted and data published detailing the success or failure of deployments and human rights assessments.

The European Commission has proven itself to be an effective regulator in the past. So, let’s regulate FRT. A blanket ban will only benefit the criminals.

Tony Porter is the Chief Privacy Officer at Corsight AI and the former UK Surveillance Camera Commissioner, and Dr Nicole Benjamin Fink is the Founder of Conservation Beyond Borders.






Fitch downgrade highlights risks of U.S. debt, governance, economy

CGTN


The U.S. Capitol in Washington, May 24, 2023. /CFP


Fitch Ratings, one of the world's top credit rating agencies, downgraded the U.S. government's credit rating from the top AAA to AA+ last week. Fitch said the rating cut as a result of the expected fiscal deterioration over the next three years, a high and growing general government debt burden, and the erosion of governance relative to peers over the last two decades.

Reactions are mixed. Stocks slipped after the downgrade, with the S&P 500 and Nasdaq falling for four days in a row after the announcement. U.S. political and economic leadership are in denial with Treasury Secretary Janet Yellen calling Fitch's move "arbitrary."

"Fitch's decision is puzzling in light of the economic strength we see in the United States. I strongly disagree with Fitch's decision, and I believe it is entirely unwarranted," Yellen said, citing it was based on outdated data. But it is the same data that the Federal Reserve uses.

Three former Treasury secretaries, including Timothy Geithner, Henry Paulson and Robert Rubin, told CNN recently that the U.S.' economy is resilient, but policymakers need to take the long view on the country's fiscal challenges.

Slowing down the economy


Economic experts said the credit downgrade indicates that the U.S. is less likely to pay off its growing debt. Size of the U.S. debt has risen sharply in the past decades, surpassing $32 trillion for the first time in June. After a rating cut, investors are expected to demand a higher interest rate for loans and U.S. debt would become more costly.

The federal government could lose some of its ability to spend on social welfare programs and projects that help stimulate the economy, which in the long term could slow economic growth and leave the nation vulnerable to financial setbacks, Shai Akabas, director of economic policy at the Bipartisan Policy Center, told U.S. media ABC News.

John Gong, vice president of Research and Strategy at the University of International Business and Economics, said the downgrade doesn't spell well for investors, either.

"For investors in the United States, things are more than safety and returns of their projects. They also look at the macro environment. The prospect of U.S. government defaulting its debt is hanging out there. That's a serious risk. I think that represents a huge blow to investor's confidence," said Gong.

The political drama

Fitch's downgrade came as the first by a major rating agency in more than a decade. In 2011, another member of the big three American rating agencies, S&P, downgraded the U.S. debt and has maintained its AA+ rating since then. Currently, Moody's has kept its AAA rating on U.S.

"If the negative political actions take place again more frequently, I think certainly it will have an impact on a bond rating agency, and it's expected to be going down," said Gong.

The negative political actions Gong refers to, include the recent round of political brinkmanship over government borrowing in June. A last-minute bipartisan deal was reached after months of a deadlock between the Democrats and Republicans, to avoid a fast-approaching default.

The two major U.S. political parties view the national debt differently. While Democratic leaders call for the limit to be raised, Republicans want to limit federal spending.

Wang Jinbin, deputy dean with school of economics at Renmin University of China, said the downgrade is an objective assessment of the risk of U.S. debt, and greater risks are in the making as the ratio of its fiscal deficit to GDP may soon surpass 120 percent.

"The lack of a fundamental mechanism for fiscal balance to address the U.S. debt problem is a major systemic risk to the world economy," said Wang, adding that the rating cut could also reduce the attractiveness of the U.S. dollar and relevant assets as international investors rethink asset allocation on a global scale.
HINDUTVA IS FASCISM

‘Vengeance’: Muslim homes, shops bulldozed; 150 arrested in India’s Haryana

Residents in the state’s only Muslim-majority Nuh district say more than 300 properties were demolished in four days.

A bulldozer demolishes the property of a Muslim in Haryana's Nuh district 
[Md Meharban/Al Jazeera]

By Alishan Jafri
Published On 7 Aug 2023

Nuh, India – Abdul Rasheed says police locked him in a bus as a bulldozer demolished his shops in India’s northern Haryana state where a Muslim-majority district saw communal clashes last week.

“I was heartbroken. My family and children depended on the rent we received from the shops. We had rented shops to both Hindus and Muslims,” he told Al Jazeera on Sunday, adding that the authorities “gave no notice or showed any order, and bulldozed everything”.

“This is vengeance. They are destroying hotels, shops and homes. There is no appeal and hearing,” the 51-year-old said. “We have been handed a begging bowl.”

Rasheed’s is among more than 300 Muslim homes and businesses bulldozed by Haryana’s right-wing Bharatiya Janata Party (BJP) government since Thursday in yet another instance of collective – and selective – punishment of a community over religious violence.

A woman walks amid the debris of her son’s demolished shop in Nallhar, Nuh [Md Meharban/Al Jazeera]

The clashes began after a procession organised by a far-right Hindu group, the Vishwa Hindu Parishad (World Hindu Council or VHP) and its youth wing, the Bajrang Dal, reached Haryana’s Nuh district, about 85km (52 miles) from New Delhi.

The two organisations, affiliated with the ruling BJP, often make headlines for their violent rallies targeting India’s religious minorities, mainly Muslims and Christians.

The Hindu groups blamed Muslims – who form nearly 77 percent of Nuh’s 280,000 residents, according to the last census conducted in 2011 – for starting the violence. They said their procession was pelted with stones and their vehicles torched, leading to clashes between the two communities.

Muslims say the trigger for the violence was a Facebook video released by Monu Manesar, a notorious Hindu vigilante accused of killing two Muslim men earlier this year for allegedly transporting cow meat.

Many Hindus belonging to the privileged castes consider cows holy. Sale and consumption of beef is banned in many Indian states, while dozens of lynchings of Muslim butchers and transporters have happened since India’s Hindu nationalist Prime Minister Narendra Modi came to power in 2014.

In the video, Manesar, who according to the Haryana police is absconding, purportedly urged Hindus to join him in Nuh for the VHP-Bajrang Dal procession – a call that angered the district’s Muslims

.
Police officers in front of the demolished house of a Muslim in Nallhar, Nuh 
[Md Meharban/Al Jazeera]


‘Tyranny of the government’

As the news of clashes in Nuh spread, anti-Muslim violence erupted in different parts of Haryana.


In Gurugram, a bustling city on New Delhi’s outskirts whose glitzy highrises host several Fortune 500 companies, a young imam was beaten and stabbed to death by a mob and the mosque set ablaze.

Another mosque was attacked in Sohna, about 25km (15 miles) from Gurugram. Six people were killed in the violence last week – three of them Muslims, including a police guard, and two suspected Bajrang Dal members. A Sikh guard was the sixth to be killed in the riots.

Video Duration02:10 Brother of young imam killed in India speaks to Al Jazeera


However, all the homes, shops – both concrete and moveable – and shanties bulldozed in the aftermath of the violence belong to Muslims.

“They are torturing Mewat. This is being done to make the Bajrang Dal happy,” Rasheed told Al Jazeera, using the historical name of Nuh.

In recent years, several states governed by the BJP have seen bulldozers being deployed to destroy the properties of Muslims accused of participating in religious clashes, or other such charges

Video Duration 01:38  Hindu mob kills Imam and sets mosque on fire in India’s Gurugram


BJP spokesperson Raman Malik told Al Jazeera the demolitions were being carried out to stop “illegal encroachments” on public lands and had no connection with the riots.

When asked about the timing of the demolitions coinciding with the aftermath of the violence, he said, “Do you want this illegal work to be supported? Look at these two things separately.”

Several rights groups have condemned the Indian authorities for carrying out the demolitions, some of which were carried out miles away from the site of last week’s violence.

A high court on Monday stayed the demolition drive in Nuh and sought an explanation from the BJP government in Haryana.

“Those who had nothing to do with the violence are bearing its brunt,” said Rafiq Ahmed, who ran a medical store in Nuh. “I had a licence for this shop. This is tyranny of the government.”

Beside Rafiq stood two Muslim women who were collecting remains from their demolished shops. They told Al Jazeera the men from their families had fled the town over fears of being arrested.

‘Almost all those arrested are Muslims’

The arbitrary arrest of more than 150 Muslims for the violence, as confirmed by the police to Al Jazeera on Monday, is another aspect of the BJP government’s crackdown in Nuh, resulting in hundreds of men fleeing their homes in fear.

Tahir Husain, a lawyer defending most of the arrested, alleged the police are indiscriminately arresting people without any rigorous investigation.

“There may be one or two people from the ‘other side’ but almost all of those arrested from Nuh are Muslim,” he said, calling the arrests “unlawful and reckless”.

“It’s a scary spectacle. Following the violence, even advocates were not ready to come forward. In fact, an advocate was picked up by the police. Later, he was released but what about the common man? The poor and vulnerable with no support are at the receiving end,” he said.

“The streets have been abandoned and the atmosphere is worse than the COVID-19 lockdown. At least there was no terror in the hearts of people at that time.”

On the streets of Nuh’s Mewli village, there was an eerie silence on Sunday.

Village head Choudhary Safahat told Al Jazeera nine members of his family were picked up last week, including his grandson and nephews, after nearly 150 police officers stormed the village at about 5am.

Safahat, right, with his uncle sit at their house in Meoli Village, Nuh 
[Md Meharban/Al Jazeera]

Safahat’s 21-year-old grandson Aahir Khan is a student of law at a private university in Alwar in neighbouring Rajasthan state, about 100km (62 miles) away. The village head said Khan was appearing for his semester examinations at the time of the violence, showing his grandson’s admit card and travel tickets.

“Aahir returned in the evening and the next morning he was arrested,” said Safahat, 51.

Many others had similar stories, mainly in the worst-hit Mewli and Moradbas villages where Muslims said they were forced to flee their homes, fearing vindictive action by the police.

Shahrukh Khan, a security guard at a government medical college in Nalhar, was also picked up by the police in connection with the riots. His family claims he returned from work at about 12pm on July 30 and left for duty the next day when the clashes broke out.

“They nabbed him while he was sleeping. They did not even let him wear his clothes. All of this is so unjust,” his wife told Al Jazeera.

Safahat said one of the arrested men from his village was physically disabled. He was released the next day, he added

.
Photos of the nine members of Safahat’s family arrested from Mewli village, Nuh 
[Md Meharban/Al Jazeera]

Some people took refuge in nearby hills, a group of villagers from Mewli told Al Jazeera. “When the police come, men in the villages go into hiding leaving behind only women and children,” said one.

“Nobody is going to the police to get our boys out. There’s fear among the villagers that they will get arrested too if they approach the police,” another local added.

When asked why men from only one community were being arrested, Krishan Kumar, spokesperson for Nuh police, told Al Jazeera: “We can only arrest those who are accused. Whoever, be it a Hindu, Muslim, Christian or Sikh, will come to us, we will treat them equally.”

Prominent Muslim parliamentarian Asaduddin Owaisi said the BJP government in Haryana is protecting Manesar, the person accused of killing two Muslim men in February, and “all Hindutva [Hindu supremacist] organisations”.

“The BJP is indulging in illegal demolitions wherever their governments are. They have usurped the right of the courts of law and are giving collective punishment to the Muslim community without following the due process or the principle of natural justice,” he told Al Jazeera.


SOURCE: AL JAZEERA

 

Exploring what happens in the brain under the influence of psychedelics, while meditating and during hypnosis

Exploring what happens in the brain under the influence of psychedelics, while meditating and during hypnosis
Psilocybin, LSD, hypnosis, and meditation each induce distinct changes in 
rs-fcMRI. Paired t-tests were conducted to compare intervention vs. control for
 each ASC intervention method: (A) psilocybin (N=23), (B) LSD (N=25), 
(C) hypnosis (N=30), and (D) meditation (N=29). (A-D) Center shows the cluster 
pairs that survived connection thresholding (p<0.05 TFCE type I error protected).
 Red = increased connection between cluster pairs induced by intervention vs. 
control, blue = decreased connection between cluster pairs induced by
 intervention vs. control. Opacity of the connections is scaled according to the 
TFCE statistics for visual clarity. For further details about each cluster see
 Table S6, Table S7, Table S8, Table S9. The three brain images at the bottom of
 each panel depict the same ROI-to-ROI results in the sagittal, coronal, and axial 
planes. Network abbreviations: DAN = dorsal attention, sLOC = superior lateral 
occipital cortex, Cereb Crus = cerebellar crus, FPN = fronto parietal, Lang = 
language, ITG = inferior temporal gyrus, l/a/p DMN = lateral/anterior/posterior 
default mode, aPaHC = anterior parahippocampal cortex, STG = superior 
temporal gyrus, Som. Motor = somatormotor. r/l denotes both the left and right 
hemispheres. 
Credit: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging (2023). 
DOI: 10.1016/j.bpsc.2023.07.003

Changes in a person's "normal" mental state after taking drugs, while meditating, during hypnosis or due to specific medical conditions have been a topic of study for several years now. Some of these mental changes, which are known as altered states of consciousness, have been found to have potentially beneficial effects, reducing stress and fostering greater well-being.

Researchers at University of Zurich's Psychiatric Hospital have recently been exploring the potential of  drugs, such as psilocybin and  (LSD) for treating depression and other . In a recent paper published in Biological Psychiatry: Cognitive Neuroscience and Neuroimaging, they compared the brains of people who had taken psychedelics to those of others who were meditating or were hypnotized.

"Our group has plenty of experience studying altered states," Nathalie Rieser, one of the researchers who carried out the study, told Medical Xpress. "We have been investigating the effects of psychedelics on the brain in , given that altered states of consciousness are becoming increasingly relevant in the treatment of psychiatric disorders. Anecdotally, people often report similarities in experiences induced by hypnosis, meditation, or psychedelics. However, our neurobiological understanding of these states is only just evolving."

While many studies looked at individual altered states of consciousness and how they manifest in the brain, comparisons between these states remain scarce. Rieser and her colleagues wished to fill this gap in the literature, by comparing the neural correlates of psychedelics, meditation and hypnosis.

"We did not know if the same neurobiological alterations give rise to the experience of all altered states or whether these states are different on a brain-level," Rieser said.

Rather than conducting a single experiment that collectively involved psychedelics, meditation and hypnosis, the researchers analyzed datasets conducted during four distinct experimental trials. The first two trials examined the effects of two different psychedelic drugs on the brain, namely psilocybin and LSD, while the last two focused on hypnosis and meditation.

Exploring what happens in the brain under the influence of psychedelics, while meditating and during hypnosis
Pharmacological vs. Non-Pharmacological ASC Interventions. (A) A 2x2 mixed ANOVA with 
a between-subjects factor of ASC intervention method (pharmacological (Ph) vs. 
non-pharmacological (N-Ph)) and a within-subjects factor State (intervention vs. control) 
was conducted. Pharmacological interventions (N=48) include psilocybin and LSD; 
non-pharmacological interventions (N=59) include hypnosis and meditation. Center shows
 the 22 cluster pairs that survived connection thresholding (p<0.05 TFCE type I error 
protected). Red = increased connection between cluster pairs induced by pharmacological 
vs. non-pharmacological interventions, blue = decreased connection between cluster pairs
 induced by pharmacological vs. non-pharmacological interventions. Opacity of the 
connections is scaled according to the TFCE statistic for visual clarity. The 132 ROIs used 
are arranged into 22 networks, and the relevant networks are displayed on the outer ring. 
The three brain images in the right column depict the same ROI-to-ROI connectivity results
 in the sagittal, coronal, and axial planes. For further details about each cluster see Table 
S10. (B) Confusion matrix showing the predicted vs. the true classifications of subjects'
 intervention vs. control ROI-to-ROI connectivity matrices into either pharmacological or 
non-pharmacological interventions. Green = correct predictions, red = incorrect predictions. 
(C) Model predictions per subject (as we used a leave-one-subject out cross-validation
 scheme each fold represents an individual subject). The y-axis shows each subject grouped 
by ASC intervention method. The x-axis shows whether the subjects were classified as havin
g undergone the pharmacological intervention (negative function value), or 
non-pharmacological condition (positive function value). 
Credit: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging (2023).
 DOI: 10.1016/j.bpsc.2023.07.003

"We combined four different datasets that were collected at the Psychiatric University Hospital in Zurich using the same MRI-scanner," Rieser explained. "For the psychedelic studies, we included healthy participants who subsequently received psilocybin, LSD, or a placebo, whereas the meditation and hypnosis studies were conducted with participants who were experts in the respective field to make sure they can reach the state in an MR environment."

During the team's four experimental trials, all participants were asked to simply lay inside an MRI scanner without completing any task or engaging in any activity. The MRI scanner recorded their brain activity both while they were in a normal state of consciousness and under the altered state of consciousness relevant to that trial (i.e., after taking psychedelics, while meditating or while under hypnosis).

"We analyzed the participants' brain activity throughout the whole brain and investigated whether different brain areas work together in a distinct way compared to the baseline scan," Rieser said. "Our findings showed that even though psilocybin, LSD, meditation and hypnosis induce overlapping subjective effects, the underlying brain changes are distinct."

The findings gathered by this team of researchers suggest that while some might report having similar experiences or feelings under these different states of consciousness, what is happening in their brain is actually very different. While psilocybin and LSD appeared to produce similar , the changes they induced were markedly different from those observed during meditation or hypnosis. This suggests that psychedelics,  and  have distinct underlying mechanisms of action and overall different effects on the brain.

Overall, these results suggest that these three distinct states may have synergistic therapeutic effects and may not therapeutically substitute each other. In the future, they could pave the way for further investigations of their unique strengths and benefits, potentially informing the development of new promising therapeutic strategies for psychiatric disorders.

"We are now simultaneously working on investigating mechanisms of action of psychedelics in healthy controls as well as their  in the treatment of patients with alcohol use disorder and major depressive disorder," Rieser added. "We are assessing their efficacy and exploring , behavioral, and cognitive changes in response to psychedelic-assisted therapy. The current study is informing future investigations on optimizing psychedelic-assisted therapy."

More information: Flora F. Moujaes et al, Comparing neural correlates of consciousness: from psychedelics to hypnosis and meditation, Biological Psychiatry: Cognitive Neuroscience and Neuroimaging (2023). DOI: 10.1016/j.bpsc.2023.07.003


© 2023 Science X NetworkPersonal psychedelic use may be common among psychedelic therapists


SEE




Remains found in China may belong to third human lineage

Remains found in China may belong to third human lineage
The virtually reconstructed HLD 6 skull. Credit: Wu Liu et al. Proceedings of the National 
Academy of Sciences (2019). DOI: 10.1073/pnas.1902396116

A team of paleontologists at the Chinese Academy of Sciences, working with colleagues from Xi'an Jiaotong University, the University of York, the University of Chinese Academy of Sciences and the National Research Center on Human Evolution, has found evidence of a previously unknown human lineage. In their study, reported in Journal of Human Evolution, the group analyzed the fossilized jawbone, partial skull and some leg bones of a hominin dated to 300,000 years ago.

The fossils were excavated at a site in Hualongdong, in what is now a part of East China. They were subsequently subjected to both a morphological and a geometric assessment, with the initial focus on the jawbone, which exhibited unique features—a triangular lower edge and a unique bend.

The research team suggests that the unique features of the jawbone resemble those of both modern humans and Late Pleistocene hominids. But they also found that it did not have a chin, which suggests that it was more closely related to older species. They found other features that resemble hominins of the Middle Pleistocene, which, when taken together, suggested the individual most resembled a Homo erectus species. And that, they conclude, suggests a hybrid of modern human and ancient hominid.

The researchers note that the combination of features has never before been observed in hominids in East Asia, suggesting that traits found in modern humans began to appear as far back as 300,000 years ago.

In turning their attention to the skull, which a prior team had found to be the first-ever Middle Pleistocene human skull found in southeastern China, the new team found that the bones in its face were more similar to those in  than was the case for the jawbone.

In an effort to determine a species for the remains, the team ruled out Denisovan. That left them with the likelihood that the fossils represent a third lineage—one that is not Denisovan or Homo erectus, and is closer to Homo sapiens. And if this is the case, the species would very likely have shared some  with hominins of the Middle or Late Pleistocene, resulting in shared characteristics.

More information: Xiujie Wu et al, Morphological and morphometric analyses of a late Middle Pleistocene hominin mandible from Hualongdong, China, Journal of Human Evolution (2023). DOI: 10.1016/j.jhevol.2023.103411

Indian lunar landing mission enters moon's orbit

An Indian Space Research Organisation (ISRO) rocket carrying the Chandrayaan-3 lifts off on July 14, 2023
An Indian Space Research Organisation (ISRO) rocket carrying the Chandrayaan-3 lifts
 off on July 14, 2023.

India's latest space mission entered the moon's orbit on Saturday ahead of the country's second attempted lunar landing, as its cut-price space program seeks to reach new heights.

The world's most populous nation has a comparatively low-budget aerospace program that is rapidly closing in on the milestones set by global space powers.

Only Russia, the United States and China have previously achieved a controlled landing on the .

The Indian Space Research Organisation (ISRO) confirmed that Chandrayaan-3, which means "Mooncraft" in Sanskrit, had been "successfully inserted into the ", more than three weeks after its launch.

If the rest of the current mission goes to plan, the mission will safely touch down near the moon's little-explored south pole between August 23 and 24.

India's last attempt to do so ended in failure four years ago, when  lost contact moments before landing.

Developed by ISRO, Chandrayaan-3 includes a lander module named Vikram, which means "valor" in Sanskrit, and a rover named Pragyan, the Sanskrit word for wisdom.

The mission comes with a  of $74.6 million—far smaller than those of other countries, and a testament to India's frugal space engineering.

Experts say India can keep costs low by copying and adapting existing , and thanks to an abundance of highly skilled engineers who earn a fraction of their foreign counterparts' wages.

India's space programme has grown considerably in size and momentum since it first sent a probe to orbit the Moon in 2008
India's space program has grown considerably in size and momentum since it first sent a
 probe to orbit the Moon in 2008.

'A moment of glory'

The Chandrayaan-3 spacecraft has taken much longer to reach the moon than the manned Apollo missions of the 1960s and 1970s, which arrived in a matter of days.

The Indian rocket used is much less powerful than the United States' Saturn V and instead the probe orbited the earth five or six times elliptically to gain speed, before being sent on a month-long lunar trajectory.

If the landing is successful the rover will roll off Vikram and explore the nearby lunar area, gathering images to be sent back to Earth for analysis.

The rover has a mission life of one lunar day or 14 Earth days.

ISRO chief S. Somanath has said his engineers carefully studied data from the last failed mission and tried their best to fix the glitches.

India's space program has grown considerably in size and momentum since it first sent a probe to orbit the moon in 2008.

In 2014, it became the first Asian nation to put a satellite into orbit around Mars, and three years later, the ISRO launched 104 satellites in a single mission.

The ISRO's Gaganyaan ("Skycraft") program is slated to launch a three-day manned  into Earth's orbit by next year.

India is also working to boost its two percent share of the global commercial space market by sending private payloads into orbit for a fraction of the cost of competitors.

© 2023 AFP

Ancient lake microbes caused global warming during ice age

Ancient lake microbes caused global warming during ice age
Model of methane production from microbial activity in an alkaline lake. Credit: Xia et al, 2023.

Global warming is not just a modern issue, but has occurred numerous times over Earth's history, with one such event happening 304 million years ago during the Late Paleozoic Ice Age (which spanned from 340 to 290 million years ago). Studies have discovered evidence of increased sea surface temperature, continental ice decline and oceanic environments flooding the land at the time.

Dr Liuwen Xia at Nanjing University, China, and collaborators researched the effect of a large injection of  from alkaline lakes (pH 9 to 12) into the atmosphere, in work published in Geology.

Large quantities of atmospheric methane causes  as it is a potent greenhouse gas trapping heat 28 times more effectively than carbon dioxide over 100 years. Methane-producing microorganisms are responsible for 74% of global methane emissions, therefore defining the  that encourage them to not only survive but thrive is important for understanding climate change.

The Junggar Basin in northwest China was investigated by assessing methane levels derived from microbial activity. The researchers took  from the  bed and undertook chemical analyses of the rock to determine the type of carbon present based upon its source from aquatic green algae, cyanobacteria (photosynthesising microorganisms) and halophilic archaea (an extreme microorganisms that lives in high salt environments).

When the lake contains more dissolved inorganic carbon (a form that doesn't have carbon and ) the algae, cyanobacteria and archaea preferentially take up the lighter form (carbon-12) meaning the heavier carbon-13 remains in the lake water and is deposited, leading to distinct differences in the measurements taken from the rock.

The researchers found one particular type, alkalophilic methanogenic archaea, took a competitive advantage in the low sulfate anoxic environmental conditions of the lake, preserving the heaviest carbon-13 values in the rock. This species thrived by obtaining the energy required for growth by producing large quantities of methane in the , which was then released into the atmosphere. Methane emissions from microbial activity alone are suggested to have been up to 2.1 gigatons.

Carbon dioxide derived from volcanic activity and hydrothermal processes transported to the lake was converted into bicarbonate and carbonate (forms of dissolved inorganic carbon), which increased the alkalinity of the lake and is noted to enhance the creation of methane as it promotes microbial activity. Dissolved inorganic carbon provides an almost limitless supply of carbon to the algae, cyanobacteria and archaea for their metabolic processes.

Therefore, linking this increased and consistent supply of methane to the Late Paleozoic Ice Age, which had a peak in atmospheric methane 304 million years ago, may suggest that the combined contribution from numerous alkaline lakes globally could have had a significant impact on global greenhouse gas levels. The researchers suggest that, taking the lakes in northwest China alone, methane emissions could have reached 109 gigatonnes, which is equivalent to the greenhouse forcing power of up to 7521 gigatonnes of .

Clearly this highlights the potency of methane in affecting our climate, and specifically the importance of identifying alkaline lakes globally to monitor their current emissions and find solutions to help combat their activity. This can include reducing the pH of the lakes so that they become more acidic, adding certain types of clay or even dredging the lake bottom, but all of these solutions naturally introduce a host of their own effects on the environment. As such, there may not yet be a clear solution to reducing  from lakes and abating their global warming potential.

More information: Liuwen Xia et al, Effects on global warming by microbial methanogenesis in alkaline lakes during the Late Paleozoic Ice Age (LPIA), Geology (2023). DOI: 10.1130/G51286.1

Journal information: Geology 


© 2023 Science X NetworkBlue-green algae found to produce greenhouse gas methane


Hartshorn salt and 'baking' may solve a serious environmental problem, scientists believe

Hartshorn salt and "baking" solves a serious environmental problem
Depolymerized plastic from the polyester fabric. Credit: University of Copenhagen

Polyester is the second most used textile in the world and an environmental menace, especially because most of it never gets recycled. The fabric, a blend of plastic and cotton, has been difficult for the industry to separate and therefore recycle.

Now, a group of chemists from the University of Copenhagen has invented a green and surprisingly simple solution using a single household ingredient. The study is published in the journal ACS Sustainable Chemistry & Engineering.

From clothes to sofas to curtains,  dominates our everyday lives, with a staggering 60 million metric tons of this popular fabric produced annually. However, polyester production takes a toll on the climate and the environment, as only a mere 15% of it is recycled, while the rest ends up in landfills or incinerated, being responsible of more carbon emission.

Recycling polyester poses a significant challenge, particularly in separating the plastic and cotton fibers that the blend fabric is made of without losing either of them in the process. Conventional recycling methods often prioritize preserving the plastic component, resulting in a loss of cotton fibers. Moreover, these methods are costly, complex, and generate metal waste due to the use of metal catalysts, which can be cytotoxic and contaminate the process.

In a remarkable breakthrough, a group of young chemists has unveiled a surprisingly simple solution to this pressing problem, potentially revolutionizing the sustainability of the textile industry.

"The textile industry urgently requires a better solution to handle blended fabrics like polyester/cotton. Currently, there are very few practical methods capable of recycling both cotton and plastic—it's typically an either-or scenario," says postdoc Yang Yang of the Jiwoong Lee group at the University of Copenhagen's Department of Chemistry, who serves as the lead author of the scientific research article.

"However, with our newly discovered technique, we can depolymerize polyester into its monomers while simultaneously recovering cotton on a scale of hundreds of grams, using an incredibly straightforward and environmentally friendly approach. This traceless catalytic methodology could be the game-changer."

Hartshorn salt and 24 hours in the 'oven'

The new method requires no special equipment—just heat, a non-toxic solvent, and an ordinary household ingredient.

"For example, we can take a polyester dress, cut it up into small pieces and place it in a container. Then, add a bit of mild solvent, and thereafter hartshorn salt, which many people know as a leavening agent in baked goods. We then heat it all up to 160° Celsius and leave it for 24 hours. The result is a liquid in which the plastic and cotton fibers settle into distinct layers. It's a simple and cost-effective process," explains Shriaya Sharma, a doctoral student of the Jiwoong Lee group at the Department of Chemistry and study co-author.

In the process, the hartshorn salt, also called ammonium bicarbonate, is broken down into ammonia, CO2 and water. The combination of ammonia and CO2 acts as a catalyst, triggering a selective depolymerization reaction that breaks down the polyester while preserving the cotton fibers. Although ammonia is toxic in isolation, when combined with CO2, it becomes both environmentally friendly and safe for use. Due to the mild nature of the chemicals involved, the cotton fibers remain intact and in excellent condition.

Previously, the same research group demonstrated that CO2 could serve as a catalyst for breaking down nylon, among other things, without leaving any trace. This discovery inspired them to explore the use of hartshorn salt. Nevertheless, the researchers were pleasantly surprised when their simple recipe yielded successful results.

"At first, we were excited to see it work so well on the PET bottles alone. Then, when we discovered that it worked on polyester fabric as well, we were just ecstatic. It was indescribable. That it was so simple to perform was nearly too good to be true," says Carlo Di Bernardo, doctoral student and study co-author.

While the method has only been tested at the laboratory level thus far, the researchers point to its scalability and are now in contact with companies to test the method on an industrial scale.

"We're hoping to commercialize this technology that harbors such great potential. Keeping this knowledge behind the walls of the university would be a huge waste," concludes Yang Yang.

More information: Yang Yang et al, Catalytic Fabric Recycling: Glycolysis of Blended PET with Carbon Dioxide and Ammonia, ACS Sustainable Chemistry & Engineering (2023). DOI: 10.1021/acssuschemeng.3c03114