Every year, the night sky grows brighter, and the stars look dimmer.

A new study that analyzes data from more than 50,000 amateur stargazers finds that artificial lighting is making the night sky about 10% brighter each year.

That’s a much faster rate of change than scientists had previously estimated looking at satellite data. The research, which includes data from 2011 to 2022, is published Thursday in the journal Science.

“We are losing, year by year, the possibility to see the stars,” said Fabio Falchi, a physicist at the University of Santiago de Compostela, who was not involved in the study.

“If you can still see the dimmest stars, you are in a very dark place. But if you see only the brightest ones, you are in a very light-polluted place,” he said.

As cities expand and put up more lights, “skyglow” or “artificial twilight,” as the study authors call it, becomes more intense.

The 10% annual change “is a lot bigger than I expected — something you’ll notice clearly within a lifetime,” said Christopher Kyba, a study co-author and physicist at the German Research Centre for Geosciences in Potsdam.

Kyba and his colleagues gave this example: A child is born where 250 stars are visible on a clear night. By the time that child turns 18, only 100 stars are still visible.

“This is real pollution, affecting people and wildlife,” said Kyba, who said he hoped that policymakers would do more to curb light pollution. Some localities have set limits.

The study data from amateur stargazers in the nonprofit Globe at Night project was collected in a similar fashion. Volunteers look for the constellation Orion — remember the three stars of his belt — and match what they see in the night sky to a series of charts showing an increasing number of surrounding stars.

Prior studies of artificial lighting, which used satellite images of the Earth at night, had estimated the annual increase in sky brightness to be about 2% a year.

But the satellites used aren’t able to detect light with wavelengths toward the blue end of the spectrum — including the light emitted by energy-efficient LED bulbs.

More than half of the new outdoor lights installed in the United States in the past decade have been LED lights, according to the researchers.

The satellites are also better at detecting light that scatters upward, like a spotlight, than light that scatters horizontally, like the glow of an illuminated billboard at night, said Kyba.

Skyglow disrupts human circadian rhythms, as well as other forms of life, said Georgetown biologist Emily Williams, who was not part of the study.

“Migratory songbirds normally use starlight to orient where they are in the sky at night,” she said. “And when sea turtle babies hatch, they use light to orient toward the ocean — light pollution is a huge deal for them.”

Part of what’s being lost is a universal human experience, said Falchi, the physicist at University of Santiago de Compostela.

“The night sky has been, for all the generations before ours, a source of inspiration for art, science, literature,” he said.
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As the coronavirus pandemic enters its fourth year, the United States is grappling with a new subvariant of COVID-19 called XBB.1.5, and China is reporting a spike in cases following the dismantling of its zero-COVID policy. VOA’s Laurel Bowman reports.
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Environmental activist Greta Thunberg is set to meet International Energy Agency executive director Fatih Birol in Davos on Thursday, organizers of a fringe round-table event at the World Economic Forum’s annual meeting told Reuters.

Thunberg is to meet Birol along with fellow campaigners Helena Gualinga, Vanessa Nakate and Luisa Neubauer, the organizers said in a statement.

The IEA, which makes policy recommendations on global energy, had no immediate comment.

Thunberg was released by police on Tuesday after being detained alongside other climate activists during protests in Germany.

“Yesterday I was part of a group that peacefully protested the expansion of a coal mine in Germany. We were kettled by police and then detained but were let go later that evening,” she tweeted, adding: “Climate protection is not a crime.”

‘We are not winning’

Former United States Vice President Al Gore said in Davos that he agreed with Thunberg’s efforts in Germany and that the climate crisis was getting worse faster than the world was tackling it.

“We are not winning. The crisis is still getting worse faster than we are deploying these solutions,” Gore told a WEF panel, highlighting a growing gap between those “old enough to be in positions in power and the young people of this world.”

Thunberg, whose current whereabouts are not clear, attended the WEF meeting in Davos in January 2020, when she challenged world leaders, including former U.S. President Donald Trump, to act on climate change, saying that “our house is still on fire.”

She has also participated in previous protests on the fringes of the gathering, which brings business and political leaders together in the Swiss ski resort for a dialogue on topical issues.

Activists protest oil firms’ role

Climate change is one of the main items on the agenda for this year’s meeting, which has already seen protests against the role of big oil firms, with activists saying they are hijacking the debate over how to address global warming.

Representatives of major energy firms including BP, Chevron, Occidental Petroleum Corp., and Saudi Aramco are among 1,500 business leaders gathered there.

U.N. Secretary-General Antonio Guterres on Wednesday called on the WEF attendees to make “credible,” accountable net-zero pledges.

A social media campaign this week added to pressure on oil and gas companies, promoting a “cease and desist” notice sponsored by Thunberg, Nakate, Neubauer and Gualinga through the non-profit website Avaaz.

The call, which has garnered more than 850,000 signatures, demands that energy company CEOs “immediately stop opening any new oil, gas, or coal extraction sites, and stop blocking the clean energy transition we all so urgently need.”

It threatens legal action and more protests if they fail to comply.

The oil and gas industry has said that it needs to be part of the energy transition as fossil fuels will continue to play a major role in the world’s energy mix as countries shift to low- economies.
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The impact of Russia’s war in Ukraine is being felt as far away as Indian-administered Kashmir, where ornithologists see the conflict as contributing to a shortage of migratory birds which make their way each winter from Europe to the wetlands of the Kashmir Valley.

Every February, the wildlife protection department conducts a census of migratory birds in Kashmir. The department says that more than 1.1 million birds of 39 species visited the region in 2021. The census estimated 810,000 birds in 2020 and 950,000 in 2019.

The department has not yet begun this year’s count but the wildlife warden of wetlands, Ifshan Dewan, told VOA, “I am getting reports from various wetlands on low arrival of migratory birds compared to the last year.”

Experts believe that the nearly year-old war between Russia and Ukraine could be one reason for the reduced size of this year’s migratory flocks, both in Kashmir and elsewhere in the region.

Irfan Jeelani, founder of the birding club Birds of Kashmir, told VOA that birds from China, Siberia, central Asia and Europe visit Kashmir every winter. “Birds from Europe could be affected due to the war and have altered their flyway to reach here; however, weak ones couldn’t reach their destinations,” Jeelani suggested.

A similar pattern has been noted in the neighboring Jammu region, where Parmil Kumar, the head of the department of statistics at the University of Jammu, said the war in Ukraine could have been responsible for some species arriving almost two weeks later than usual.

“There is also a reduction of about 15% in the number of birds visiting this winter to Jammu region,” said Kumar, who is a birder himself.

Bird migration expert Andrew Farnsworth agreed that the Ukraine-Russia war could be a factor affecting the number of migratory birds visiting the Kashmir region this winter but noted that birds come to the valley from many regions besides Europe.

“Maybe slightly, but there are so many other factors and so many more birds arriving from more easterly locations to Kashmir, in addition to ongoing military and industrial activities in and around Kashmir for years,” said Farnsworth, a senior research associate at the Cornell Lab of Ornithology.

“War can and certainly does affect the movements of birds, whether by habitat destruction, increased hunting pressure during long conflicts, or destruction by military actions.”

Wildlife experts are looking to see if this year’s census bears out observations seeming to show significantly reduced populations of bird species that make the trip from Europe, such as the black stork, great white pelican and purple heron.

Wildlife experts in Ukraine say there is no doubt that the war is endangering a wide variety of creatures there.

The conflict has “threatened not only Ukraine’s population but also biodiversity, including a significant number of rare and globally vulnerable bird species,” said a recent article by Oleg Dudkin, CEO of the Ukrainian Society for the Protection of Birds and Martin Harper, regional director at BirdLife Europe & Central Asia.

Asad R. Rahmani, a member of the governing body of Wetlands International South Asia, said another likely explanation for the declining migratory bird population in Kashmir is the destruction of wetlands that provide a winter home for the birds.

“Most birds that come to India belong to the Central Asian Flyway and Ukraine does not fall in this flyway,” he told VOA. “There is always a movement from Europe of some birds. Still, the bulk of the migratory birds come from central Russia, Mongolia, northern China, Tibet, and some countries of central Asia.”

If adequately protected, Kashmir’s wetlands could become a major tourist attraction, he added.

Rashid Naqash, the regional wildlife warden for the Kashmir region, said in an interview that his department is trying its best to protect the region’s wetlands. His department manages eight main wetlands where migratory birds congregate in huge droves during winter.

Regarding the war in Ukraine, Naqash said the migratory birds instinctively avoid places with a lot of activity and instead take safer routes to get to their wintering grounds. But he said, “It is hard, dangerous, and stressful for migratory birds to find other ways to get to where they spend the winter.”
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Campaigners have welcomed a decision to remove the skeleton of an 18th century man with gigantism from public display at a London museum.

The remains of Charles Byrne, who was 2.31 meters (7ft 7in), had been on show at the Hunterian Museum at the Royal College of Surgeons of England in central London.

But the museum has said the self-styled “Irish Giant” will not be part of the collection when it reopens in March after a five-year, £4.6-million ($5.7-million) refurbishment.

Thomas Muinzer, a senior law lecturer at Aberdeen University in Scotland, called the decision “wonderful news”.

But he said the development was only a “partial success”, as Byrne himself wanted to be buried at sea, to prevent anatomists using him for study.

In 2011, Muinzer and Len Doyal, a medical ethicist, published a paper in the British Medical Journal, calling for Byrne’s final wishes to be respected.

“Byrne’s remains ought to be buried at sea or at least be withdrawn from public display,” they wrote.

The British writer Hilary Mantel, who died last year and wrote a 1998 fictionalized portrait of Byrne called “The Giant”, had also backed the campaign.

RCS England said last week that trustees of the collection had discussed the “sensitivities” of keeping and displaying Byrne’s skeleton during the closure.

The skeleton was acquired after Byrne’s death aged 22 in 1783 by the eminent surgeon and anatomist John Hunter.

Before he could be buried, Hunter paid Byrne’s friends £500 — the equivalent of £60,000 today — for his body.

The decision comes as museums in the UK and around the world are reassessing the provenance of their collections.

The Hunterian is due to begin a new program later this year “to promote new research and explore issues around the display of human remains and the acquisition of specimens” during the British colonial period.

Hunter and others in the 18th and 19th century “acquired many specimens in ways we would not consider ethical today”, it added.

A decision has been made to only make the skeleton only available for “bona fide medical research” into gigantism.

Muinzer said it had already been extensively studied and its complete DNA extracted, but scientific understanding of the condition remains limited and people still suffer from it today.

As a result, Byrne’s last wishes — which RCS England said are well-documented but anecdotal — should be respected, he added.

“We don’t have to worry about the resurrectionists and grave robbers now thank goodness,” he added.
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A sharp spike in Greenland temperatures since 1995 showed the giant northern island 1.5 degrees Celsius (2.7 degrees Fahrenheit) hotter than its 20th-century average, the warmest in more than 1,000 years, according to new ice core data.
Until now Greenland ice cores — a glimpse into long-running temperatures before thermometers — hadn’t shown much of a clear signal of global warming on the remotest north central part of the island, at least compared to the rest of the world. But the ice cores also hadn’t been updated since 1995. Newly analyzed cores, drilled in 2011, show a dramatic rise in temperature in the previous 15 years, according to a study in Wednesday’s journal Nature.

“We keep on (seeing) rising temperatures between 1990s and 2011,” said study lead author Maria Hoerhold, a glaciologist at the Alfred Wegener Institute in Germany. “We have now a clear signature of global warming.”

It takes years to analyze ice core data. Hoerhold has new cores from 2019 but hasn’t finished studying them yet. She expects the temperature rise to continue as Greenland’s ice sheet and glaciers have been melting faster recently.

“This is an important finding and corroborates the suspicion that the ‘missing warming’ in the ice cores is due to the fact that the cores end before the strong warming sets in,” said climate scientist Martin Stendel of the Danish Meteorological Institute, who wasn’t part of the research.

The ice cores are used to make a chart of proxy temperatures for Greenland running from the year 1000 to 2011. It shows temperatures gently sloping cooler for the first 800 years, then wiggling up and down while sloping warmer until a sharp and sudden spike hotter from the 1990s on. One scientist compared it to a hockey stick, a description used for other long-term temperature data showing climate change.

The jump in temperature after 1995 is so much larger than pre-industrial times before the mid-19th century that there is “almost zero” chance that it is anything but human-caused climate change, Hoerhold said.

The warming spike also mirrors a sudden rise in the amount of water running off from Greenland’s melting ice, the study finds.

What had been happening in Greenland is that natural weather variability, undulations because of an occasional weather system called Greenland blocking, in the past had masked human-caused climate change, Hoerhold said.

But as of about 25 years ago, the warming became too big to be hidden, she said.

Past data also showed Greenland not warming as fast as the rest of the Arctic, which is now warming four times faster than the global average. But the island appears to be catching up.

Ice core data for years showed Greenland acted a bit differently from the Arctic. That’s likely because of Greenland blocking, Hoerhold said. Other scientists said as a giant land mass Greenland was less affected by melting sea ice and other water factors compared to the rest of the Arctic, which is much more water-adjacent.

Hoerhold’s team drilled five new cores near old cores so as to match established ice core records. They use the difference between two different types of oxygen isotopes found in the ice to calculate temperature, using an already established formula that is checked against observed data.

Hoerhold and outside scientists said the new warming data is bad news because Greenland’s ice sheet is melting. In fact, the study ends with data from 2011 and the next year had a record melt across Greenland and the island’s ice loss has been on high since then, she said.

“We should be very concerned about North Greenland warming because that region has a dozen sleeping giants in the form of wide tidewater glaciers and an ice stream,” said Danish Meteorological Institute ice scientist Jason Box. And when awakened, it will ramp up melt from Greenland, he said.

And that means “rising seas that threaten homes, businesses, economies and communities,” said U.S. National Snow and Ice Data Center Deputy Lead Scientist Twila Moon.
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The U.S. government says it will begin a targeted crackdown on nursing homes’ abuse of antipsychotic drugs and misdiagnoses of schizophrenia in patients.

The Centers for Medicare and Medicaid Services is launching investigations this month into select nursing homes, aimed at verifying whether patients have been properly diagnosed with the psychiatric disorder.

Evidence has mounted over decades that some facilities wrongly diagnose residents with schizophrenia or administer antipsychotic drugs to sedate them, despite dangerous side effects that could include death, according to the agency.

“No nursing home resident should be improperly diagnosed with schizophrenia or given an inappropriate antipsychotic,” Health and Human Services Secretary Xavier Becerra said in a statement Wednesday. “The steps we are taking today will help prevent these errors and give families peace of mind.”

Some facilities may be dodging increased scrutiny around gratuitous use of antipsychotic medications by coding residents as having schizophrenia, even when they do not show signs of the extremely rare disorder, a government report last year found. Less than 1% of the population is believed to have schizophrenia, which is marked by delusions, hallucinations and disordered thinking.

In 2012, the federal government began tracking when nursing homes use antipsychotics on residents — doing so can impact the facility’s quality rating in a public database — but only for those who have not been diagnosed with schizophrenia.

Antipsychotics for those nursing home residents has dropped to under 20% in recent years, according to federal data.

A November report from the HHS Office of the Inspector General, however, revealed that the number of residents reported as having schizophrenia without a corresponding diagnosis skyrocketed between 2015 and 2019, with 99 nursing homes in the country reporting that 20% or more of their residents have the disorder.

“The number of unsupported schizophrenia diagnoses increased and in 2019 was concentrated in relatively few nursing homes,” the report concluded.

Nursing homes have worked on other ways to treat residents, especially those with dementia, and trained staff to use alternative methods, said Katie Smith Sloan, the CEO of LeadingAge, an association of nonprofit aging service providers.

“Much has been achieved since the program’s start in 2012, and nursing homes deserve a lot of the credit for the progress,” she said in a statement.

CMS will start targeted audits to ask nursing homes for documentation of the diagnoses in the coming days, focusing on nursing homes with existing residents who have been recorded as having schizophrenia.

The rating scores for nursing homes that have a pattern of inaccurately coding residents as having schizophrenia will be negatively impacted, CMS said in a statement released Wednesday, stopping short of threatening to levy fines against facilities.

The agency does not have plans to immediately intervene in the patients’ care directly or notify relatives of residents who have been wrongly coded or given antipsychotics, according to senior HHS officials who insisted on anonymity to brief The Associated Press on the matter on Tuesday.

CMS will monitor the facilities to make sure the issues are corrected, officials said.
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There was visible excitement among students when schools reopened Tuesday in Malawi’s two biggest cities, Lilongwe and Blantyre, after a two-week suspension caused by a cholera outbreak. 

The bacterial illness has killed close to 800 people, more than 100 of them children, and affected more than 25,000. 

Malawi’s government announced measures to prevent cholera from spreading in schools but warned it will shut down the schools again if needed.  

To many students, especially those who are preparing to take national examinations this year, the closure doomed their hope of passing the exams.

Ronnie Lutepo, a teenaged student at Michiru View secondary school in Blantyre, said returning to the school was the best thing he hoped for.

“Yes, as I was at home my mum was telling me to study, but being in an examination class affected me badly,” he said. “We are all supposed to be here and ready for the exams and if we are not ready, we are not going to get good grades.”

The reopening comes after the government announced that it has put into place preventive measures against the spread of cholera, which is transmitted mainly through dirty water. 

These include fixing broken boreholes and water taps in the schools and banning the sale of cooked food around school premises.

Malawi is battling its worst cholera outbreak in a decade. Government statistics show that as of Monday it had registered 25,458 cases since the start of the outbreak last March, with 550 cases reported on Monday alone.

The disease has so far killed more than 800 people with around 1,000 hospitalizations as of Tuesday.  

Justin Rice Phiri, the deputy head teacher at Michiru View secondary school, told VOA that the school has put in place measures to prevent students from contracting the disease.

“At the same time our support staff; the cleaners and the cooks have been trained on how best to prevent the cholera and also giving them the protective wear; the gloves, the work suits and the like,” he said.

On Tuesday, the U.N.’s children’s agency, UNICEF, started distributing anti-cholera supplies in schools in areas most affected by the outbreak.

Government authorities, however, have warned that they may close the schools again should the outbreak spread among students at an unmanageable level.
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Nearly two thirds of the sharks and rays that live among the world’s corals are threatened with extinction, according to new research published Tuesday, with a warning this could further imperil precious reefs.

Coral reefs, which harbor at least a quarter of all marine animals and plants, are gravely menaced by an array of human threats, including overfishing, pollution and climate change.

Shark and ray species — from apex predators to filter feeders — play an important role in these delicate ecosystems that “cannot be filled by other species”, said Samantha Sherman, of Simon Fraser University in Canada and the wildlife group TRAFFIC International.

But they are under grave threat globally, according to the study in the journal Nature Communications, which assessed extinction vulnerability data from the International Union for Conservation of Nature (IUCN) to look at 134 species of sharks and rays linked to reefs.

The authors found 59 percent of coral reef shark and ray species are threatened with extinction, an extinction risk almost double that of sharks and rays in general.

Among these, five shark species are listed as critically endangered, as well as nine ray species, all so-called “rhino rays” that look more like sharks than stingrays.

Keeping reefs healthier

“It was a bit surprising just how high the threat level is for these species,” Sherman told AFP. 

“Many species that we thought of as common are declining at alarming rates and becoming more difficult to find in some places.”

Sherman said the biggest threat to these species by far is overfishing.

Sharks are under most threat in the Western Atlantic and parts of the Indian Ocean, whereas the Indian Ocean and Southeast Asia are the highest risks for rays.

These regions are heavily fished and do not currently have management in place to reduce the impact on these species, said Sherman.

Coral reef fisheries directly support the livelihoods and food security of over half a billion people, but this crucial ecosystem is facing an existential threat.

Human-driven climate change has spurred mass coral bleaching as the world’s oceans get warmer.

Modelling research has shown that even if the Paris climate goal of holding global warming to 1.5 degrees Celsius is reached, 99 percent of the world’s coral reefs will not be able to recover.

At two degrees of warming, the number rose to 100 percent.

“We know coral reef health is declining, largely due to climate change, however, coral reef sharks and rays can help keep reefs healthier for longer,” said Sherman. 

The study was carried out by an international team of experts from universities, government and regional oceanic and fishery organizations as well as non-governmental organizations across the world.
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Jill Biden’ s advocacy for curing cancer didn’t start with her son’s death in 2015 from brain cancer. It began decades earlier, long before she came into the national spotlight, and could now be further energized by her own brush with a common form of skin cancer.

The first lady often says the worst three words anyone will ever hear are, “You have cancer.” She heard a version of that phrase for herself this past week.

A lesion that doctors had found above her right eye during a routine screening late last year was removed on Wednesday and confirmed to be basal cell carcinoma — a highly treatable form of skin cancer. While Biden was being prepped to remove the lesion, doctors found and removed another one from the left side of her chest, also confirmed to be basal cell carcinoma. A third lesion from her left eyelid was being examined.

While it’s too early to know when and how Biden might address her situation publicly, her experience could inject new purpose into what has become part of her life’s work highlighting research into curing cancer and urging people to get regular screenings.

Personal experiences can add potency to a public figure’s advocacy.

“Nothing like ‘I’ve been there, done that’ and being personally involved,” said Myra Gutin, a first lady scholar at Rider University.

Biden’s spokesperson, Vanessa Valdivia, said “the first lady’s fight against cancer has always been personal. She knows that cancer touches us all.”

Biden’s advocacy dates to 1993, when four girlfriends were diagnosed with breast cancer, including her pal Winnie, who succumbed to the disease. She said last year in a speech that “Winnie inspired me to take up the cause of prevention and education.”

That experience led her to create the Biden Breast Health Initiative, one of the first breast health programs in the United States, to teach 16-to 18-year-old girls about caring for their breasts. Biden was among staffers who went into Delaware’s high schools to conduct lectures and demonstrations.

Her mother, Bonny Jean Jacobs, and father, Donald Jacobs, died of cancer, in 2008 and 1999, respectively. A few years ago, one of her four sisters needed an auto-stem cell transplant to treat her cancer.

In May 2015, Beau Biden, President Joe Biden’s son with his late first wife, died of a rare and aggressive brain cancer, leaving behind a wife and two young kids. Joe Biden was vice president at the time and the blow from Beau’s loss led him to decide against running for president in 2016. Jill Biden, who had helped raise Beau from a young age after she married his dad, was convinced he would survive the disease and later described feeling “blinded by the darkness” when he died.

After their son’s death, the Bidens helped push for a national commitment to “end cancer as we know it.” Then-President Barack Obama — Biden’s boss — put the vice president in charge of what the White House named the Cancer Moonshot.

The Bidens resurrected the initiative after Joe Biden became president and added a new goal of cutting cancer death rates by at least 50% over the next 25 years, and improving the experience of living with and surviving cancer for patients and their families.

“We’re ensuring that all of our government is ready to get to work,” Jill Biden said at the relaunch announcement at the White House last February. “We’re going to break down the walls that hold research back. We’re going to bring the best of our nation together — patients, survivors, caregivers, researchers, doctors, and advocates — all of you — so that we can get this done.”

In the years between Biden serving as vice president and running for president, the Bidens headed up the Biden Cancer Initiative, a charity.

Jill Biden, 71, has been using her first lady platform to highlight research into a cancer cure, along with other issues she has long championed, including education and military families.

Her first trip outside of Washington after the January 2021 inauguration was to Virginia Commonwealth University’s Massey Cancer Center in Richmond to call for an end to disparities in health care that she said have hurt communities of color.

She has toured cancer centers, including those for children, in New York City, South Carolina, Tennessee, Costa Rica, San Francisco and Florida, among others. She joined the Philadelphia Eagles and Phillies — two of her favorite professional sports teams — for events, including during the World Series, to highlight efforts to fight cancer through early detection and to honor patients.

For Breast Cancer Awareness Month last October, Jill Biden hosted a White House event with the American Cancer Society and singer Mary J. Blige, who became an advocate for cancer screening after losing aunts and other relatives to various forms of cancer.

The first lady also partnered with the Lifetime cable channel to encourage women to get mammograms. A Democrat, she gave an interview last year to Newsmax, the conservative cable news channel, to discuss the federal investment in accelerating the cancer fight.

She regularly encourages audiences to schedule cancer screening appointments they skipped during the pandemic out of fear of visiting doctor’s offices.

Asked on Friday how the first lady was doing, the president flashed a thumbs-up to reporters.

Basal cell carcinoma, for which the first lady was treated with the procedure known as Mohs surgery, is the most common type of skin cancer, but also the most curable form. It’s considered highly treatable, especially when caught early. It is a slow-growing cancer that doesn’t usually spread and seldom causes serious complications or becomes life-threatening.

The Skin Cancer Foundation says the delicate skin around the eyes is especially vulnerable to damage from the sun’s ultraviolet rays, which makes basal cell carcinoma on and around the eyelids particularly common.
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When Benjamin Franklin fashioned the first lightning rod in the 1750s following his famous experiment flying a kite with a key attached during a thunderstorm, the American inventor had no way of knowing this would remain the state of the art for centuries.

Scientists now are moving to improve on that 18th-century innovation with 21st-century technology — a system employing a high-powered laser that may revolutionize lightning protection. Researchers said on Monday they succeeded in using a laser aimed at the sky from atop Mount Santis in northeastern Switzerland to divert lightning strikes.

With further development, this Laser Lightning Rod could safeguard critical infrastructure including power stations, airports, wind farms and launchpads. Lightning inflicts billions of dollars in damage on buildings, communication systems, power lines and electrical equipment annually while also killing thousands of people.

The equipment was hauled to the mountaintop at an altitude of about 8,200 feet (2,500 meters), some parts using a gondola and others by helicopter, and was focused on the sky above a 400-foot-tall (124-meter-tall) transmission tower belonging to telecommunications provider Swisscom SCMN.S, one of Europe’s structures most affected by lightning.

In experiments during two months in 2021, intense laser pulses — 1,000 times per second — were emitted to redirect lightning strikes. All four strikes while the system was active were successfully intercepted. In the first instance, the researchers used two high-speed cameras to record the redirection of the lightning’s path by more than 160 feet (50 meters). Three others were documented with different data.

“We demonstrate for the first time that a laser can be used to guide natural lightning,” said physicist Aurelien Houard of Ecole Polytechnique’s Laboratory of Applied Optics in France, coordinator of the Laser Lightning Rod project and lead author of the research published in the journal Nature Photonics.

Lightning is a high-voltage electrical discharge between a cloud and the ground, within a cloud or between clouds.

“An intense laser can generate on its path long columns of plasmas in the atmosphere with electrons, ions and hot air molecules,” Houard said, referring to positively charged particles called ions and negatively charged particles called electrons.

“We have shown here that these plasma columns can act as a guide for lightning,” Houard added. “It is important because it is the first step toward a laser-based lightning protection that could virtually reach a height of hundreds of meters [yards] or a kilometer [0.6 mile] with sufficient laser energy.”

The laser device is the size of a large car and weighs more than 3 tons. It uses lasers from German industrial machine manufacturing company Trumpf Group. With University of Geneva scientists also playing a key role, the experiments were conducted in collaboration with aerospace company ArianeGroup, a European joint venture between Airbus SE AIR.PA and Safran SA SAF.PA.

This concept, first proposed in the 1970s, has worked in laboratory conditions, but until now not in the field.

Lightning rods, dating back to Franklin’s time, are metal rods atop buildings, connected to the ground with a wire, that conduct electric charges lightning strikes harmlessly into the ground. Their limitations include protecting only a small area.

Houard anticipated that 10 to 15 years more work would be needed before the Laser Lightning Rod can enter common use. One concern is avoiding interference with airplanes in flight. In fact, air traffic in the area was halted when the researchers used the laser.

“Indeed, there is a potential issue using the system with air traffic in the area because the laser could harm the eyes of the pilot if he crosses the laser beam and looks down,” Houard said. 
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