Greenpeace to fight new Brazilian nuclear plant

By Associated Press


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Greenpeace said it has asked courts to block construction of a third nuclear power plant in energy-hungry Brazil.

The environmental group said it is seeking a restraining order from a federal court in Angra dos Reis, a coastal resort south of Rio de Janeiro and the site of Brazil's only two nuclear power plants. Another action was filed in the nation's capital, Brasilia, Greenpeace press spokeswoman Gabriela Michelotti said. Public prosecutor Andre de Vasconcelos Dias in Angra dos Reis was traveling and not available for comment, his office said. The existing nuclear plants, Angra 1 and Angra 2, have a combined installed capacity of about 2,000 megawatts. Angra 3 would raise capacity to 3,300 megawatts at a cost of about US$3.6 billion, according to the Mines and Energy Ministry. In August, the government moved to restart work on Angra 3, which has been stalled since the 1980s by lack of funds. The government said this year it could build an additional four to eight nuclear power plants after Angra 3. Greenpeace issued a statement that it's court filings name the federal government, the Eletronuclear power company, the Ibama environmental protection agency and the Rio de Janeiro State Environmental Engineering Federation, or Feema, claiming that the construction of Angra 3 is "illegal and unconstitutional." Greenpeace said the plant lacks the express authorization of President Luiz Inacio Lula da Silva and the approval of Congress.

The Associated Press telephoned Eletronuclear and Ibama but was told that no one was available to comment. A call to Feema went unanswered.

Brazil needs energy to fuel its expanding economy. In July, Ibama gave preliminary approval to a US$10 billion to US$14.7 billion project to build two dams in the Amazon that would generate 6,450 megawatts, or 8 percent of current electricity demand. Critics of nuclear energy say Brazil should use more solar, wind and biomass energy.

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Independent power project announced by B.C. Hydro now in limbo

Siwash Creek Hydroelectric Project faces downsizing under a BC Hydro power purchase agreement, with run-of-river generation, high grid interconnection costs, First Nations partnership, and surplus electricity from Site C reshaping clean energy procurement.

 

Key Points

A downsized run-of-river plant in BC, co-owned by Kanaka Bar and Green Valley, selling power via a BC Hydro PPA.

✅ Approved at 500 kW under a BC Hydro clean-energy program

✅ Grid interconnection initially quoted at $2.1M

✅ Joint venture: Kanaka Bar and Green Valley Power

 

A small run-of-river hydroelectric project recently selected by B.C. Hydro for a power purchase agreement may no longer be financially viable.

The Siwash Creek project was originally conceived as a two-megawatt power plant by the original proponent Chad Peterson, who holds a 50-per-cent stake through Green Valley Power, with the Kanaka Bar Indian Band holding the other half.

The partners were asked by B.C. Hydro to trim the capacity back to one megawatt, but by the time the Crown corporation announced its approval, it agreed to only half that — 500 kilowatts — under its Standing Order clean-energy program.

“Hydro wanted to charge us $2.1 million to connect to the grid, but then they said they could reduce it if we took a little trim on the project,” said Kanaka Bar Chief Patrick Michell.

The revenue stream for the band and Green Valley Power has been halved to about $250,000 a year. The original cost of running the $3.7-million plant, including financing, was projected to be $273,000 a year, according to the Kanaka Bar economic development plan.

“By our initial forecast, we will have to subsidize the loan for 20 years,” said Michell. “It doesn’t make any sense.”

The Kanaka Band has already invested $450,000 in feasibility, hydrology and engineering studies, with a similar investment from Green Valley.

B.C. Hydro announced it would pursue five purchase agreements last March with five First Nations projects — including Siwash Creek — including hydro, solar and wind energy projects, as two new generating stations were being commissioned at the time. A purchase agreement allows proponents to sell electricity to B.C. Hydro at a set price.

However, at least ten other “shovel-ready” clean energy projects may be doomed while B.C. Hydro completes a review of its own operations and its place in the energy sector, where legal outcomes like the Squamish power project ruling add uncertainty, including B.C.’s future power needs.

With the 1,100-megawatt Site C Dam planned for completion in 2024, and LNG demand cited to justify it, B.C. Hydro now projects it will have a surplus of electricity until the early 2030s.

Even if British Columbians put 300,000 electric vehicles on the road over the next 12 years, amid BC Hydro’s first call for power, they will require only 300 megawatts of new capacity, the company said.

A long-term surplus could effectively halt all small-scale clean energy development, according to Clean Energy B.C., even as Hydro One’s U.S. coal plant remains online in the region.

“(B.C. Hydro) dropped their offer down to 500 kilowatts right around the time they announced their review,” said Michell. “So we filled out the paperwork at 500 kilowatts and (B.C. Hydro) got to make its announcement of five projects.”

In the new few weeks, Kanaka and Green Valley will discuss whether they can move forward with a new financial model or shelve the project, he said.

B.C. Hydro declined to comment on the rationale for downsizing Siwash Creek’s power purchase agreement.

The Kanaka Bar Band successfully operates a 49.9-megawatt run-of-river plant on Kwoiek Creek with partners Innergex Renewable Energy.

 

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How Energy Use Has Evolved Throughout U.S. History

U.S. Energy Transition traces the shift from coal and oil to natural gas, nuclear power, and renewables like wind and solar, driven by efficiency, grid modernization, climate goals, and economic innovation.

 

Key Points

The U.S. Energy Transition is the shift from fossil fuels to cleaner power, driven by tech, policy, and markets.

✅ Shift from coal and oil to gas, nuclear, wind, and solar

✅ Enabled by grid modernization, storage, and efficiency

✅ Aims to cut emissions while ensuring reliability and affordability

 

The evolution of energy use in the United States is a dynamic narrative that reflects technological advancements, economic shifts, environmental awareness, and societal changes over time. From the nation's early reliance on wood and coal to the modern era dominated by oil, natural gas, and renewable sources, the story of energy consumption in the U.S. is a testament to innovation and adaptation.

Early Energy Sources: Wood and Coal

In the early days of U.S. history, energy needs were primarily met through renewable resources such as wood for heating and cooking. As industrialization took hold in the 19th century, coal emerged as a dominant energy source, fueling steam engines and powering factories, railways, and urban growth. The widespread availability of coal spurred economic development and shaped the nation's infrastructure.

The Rise of Petroleum and Natural Gas

The discovery and commercialization of petroleum in the late 19th century transformed the energy landscape once again. Oil quickly became a cornerstone of the U.S. economy, powering transportation, industry, and residential heating, and informing debates about U.S. energy security in policy circles. Concurrently, natural gas emerged as a significant energy source, particularly for heating and electricity generation, as pipelines expanded across the country.

Electricity Revolution

The 20th century witnessed a revolution in electricity generation and consumption, and understanding where electricity comes from helps contextualize how systems evolved. The development of hydroelectric power, spurred by projects like the Hoover Dam and Tennessee Valley Authority, provided clean and renewable energy to millions of Americans. The widespread electrification of rural areas and the proliferation of appliances in homes and businesses transformed daily life and spurred economic growth.

Nuclear Power and Energy Diversification

In the mid-20th century, nuclear power emerged as a promising alternative to fossil fuels, promising abundant energy with minimal greenhouse gas emissions. Despite concerns about safety and waste disposal, nuclear power plants became a significant part of the U.S. energy mix, providing a stable base load of electricity, even as the aging U.S. power grid complicates integration of variable renewables.

Renewable Energy Revolution

In recent decades, the U.S. has seen a growing emphasis on renewable energy sources such as wind, solar, and geothermal power, yet market shocks and high fuel prices alone have not guaranteed a rapid green revolution, prompting broader policy and investment responses. Advances in technology, declining costs, and environmental concerns have driven investments in clean energy infrastructure and policies promoting renewable energy adoption. States like California and Texas lead the nation in wind and solar energy production, demonstrating the feasibility and benefits of transitioning to sustainable energy sources.

Energy Efficiency and Conservation

Alongside shifts in energy sources, improvements in energy efficiency and conservation have played a crucial role in reducing per capita energy consumption and greenhouse gas emissions. Energy-efficient appliances, building codes, and transportation innovations have helped mitigate the environmental impact of energy use while reducing costs for consumers and businesses, and weather and economic factors also influence demand; for example, U.S. power demand fell in 2023 on milder weather, underscoring the interplay between efficiency and usage.

Challenges and Opportunities

Looking ahead, the U.S. faces both challenges and opportunities in its energy future, as recent energy crisis effects ripple across electricity, gas, and EVs alike. Addressing climate change requires further investments in renewable energy, grid modernization, and energy storage technologies. Balancing energy security, affordability, and environmental sustainability remains a complex task that requires collaboration between government, industry, and society.

Conclusion

The evolution of energy use throughout U.S. history reflects a continuous quest for innovation, economic growth, and environmental stewardship. From wood and coal to nuclear power and renewables, each era has brought new challenges and opportunities in meeting the nation's energy needs. As the U.S. transitions towards a cleaner and more sustainable energy future, leveraging technological advancements and embracing policy solutions, amid debates over U.S. energy dominance, will be essential in shaping the next chapter of America's energy story.

 

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Hitachi freezes British nuclear project, books $2.8bn hit

Hitachi UK Nuclear Project Freeze reflects Horizon Nuclear Power's suspended Anglesey plant amid Brexit uncertainty, investor funding gaps, rising safety regulation costs, and a 300 billion yen write-down, impacting Britain's low-carbon electricity plans.

 

Key Points

Hitachi halted Horizon's Anglesey nuclear plant over funding and Brexit risks, recording a 300 billion yen write-down.

✅ 3 trillion yen UK nuclear project funding stalled

✅ 300 billion yen impairment wipes Horizon asset value

✅ Brexit, safety rules raised costs and investor risk

 

Japan’s Hitachi Ltd said on Thursday it has decided to freeze a 3 trillion yen ($28 billion) British nuclear power project and will consequently book a write down of 300 billion yen.

The suspension comes as Hitachi’s Horizon Nuclear Power failed to find private investors for its plans to build a plant in Anglesey, Wales, where local economic concerns have been raised, which promised to provide about 6 percent of Britain’s electricity.

“We’ve made the decision to freeze the project from the economic standpoint as a private company,” Hitachi said in a statement.

Hitachi had called on the British government to boost financial support for the project to appease investor anxiety, but turmoil over the country’s impending exit from the European Union limited the government’s capacity to compile plans, people close to the matter previously said.

Hitachi had called on the British government to boost financial support for the project to appease investor anxiety, but turmoil over the country’s impending exit from the European Union and setbacks at Hinkley Point C limited the government’s capacity to compile plans, people close to the matter previously said.

Hitachi had banked on a group of Japanese investors and the British government each taking a one-third stake in the equity portion of the project, the people said. The project would be financed one-third by equity and rest by debt.

The nuclear writedown wipes off the Horizon unit’s asset value, which stood at 296 billion yen as of September-end.

Hitachi stopped short of scrapping the northern Wales project. The company will continue to discuss with the British government on nuclear power, it said.

However, industry sources said hurdles to proceed with the project are high considering tighter safety regulations since a meltdown at Japan’s Fukushima nuclear power plant in 2011 drove up costs, even as Europe’s nuclear decline strains energy planning.

Analysts and investors viewed the suspension as an effective withdrawal and saw the decision as a positive step that has removed uncertainties for the Japanese conglomerate.

Hitachi bought Horizon in 2012 for 696 million pounds ($1.12 billion), fromE.ON and RWE as the German utilities decided to sell their joint venture following Germany’s nuclear exit after the Fukushima accident.

Hitachi’s latest decision further dims Japan’s export prospects, even as some peers pursue UK offshore wind investments to diversify.

Toshiba Corp last year scrapped its British NuGen project after its US reactor unit Westinghouse went bankrupt, while Westinghouse in China reported no major impact, and it failed to sell NuGen to South Korea’s KEPCO.

Mitsubishi Heavy Industries Ltd has effectively abandoned its Sinop nuclear project in Turkey, a person involved in the project previously told Reuters, as cost estimates had nearly doubled to around 5 trillion yen.

 

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New Jersey, New York suspending utility shut-offs amid coronavirus pandemic

NY & NJ Utility Shutoff Moratorium suspends power, heat, and water disconnections amid COVID-19, as PSEG, Con Edison, Avangrid, and American Water pledge relief, supporting vulnerable customers with payment plans and health protections.

 

Key Points

A temporary pause on power, heat, and water shutoffs during COVID-19, as major utilities act to protect affected customers.

✅ Applies to power, gas, and water; restores prior shutoffs.

✅ Voluntary utility action; no PSC order required in NY.

✅ Initial moratorium runs through April; payment plans available.

 

New Jersey and New York utilities will keep the power, heat and water on for all customers in response to the coronavirus emergency, both states announced Friday.

Major utilities have agreed to suspend utility shut-offs, a particular concern for people who may be out of work and cannot afford to pay their bills.

“No utility can turn off service … if a person cannot pay their bill as a result of responding to this virus situation,” said New York Gov. Andrew Cuomo during a press conference Friday.

Utilities in New York have voluntarily agreed to this measure, according to the governor’s office, reflecting a broader state moratorium on disconnections during emergencies. No order from the Public Service Commission is expected.

With growing concerns about the economic impacts of a virtual shutdown of businesses and large events to curtail the spread of the novel coronavirus, advocates are increasingly pushing financial relief for families amid pandemic energy insecurity pressures. There’s a campaign in New York to suspend evictions and foreclosures, with growing political support. A similar call has gone out in New Jersey.

As the weather warms, shut-offs of electric and gas service due to nonpayment tend to pick up. If people are quarantined or out of work due to a widespread economic slowdown, some advocates say they shouldn’t have to worry about having the lights or heat turned off, especially as examples of unpaid utility bills straining cities have emerged elsewhere.

“We recognize that customers may experience financial difficulty as a result of the outbreak, whether they or a family member fall ill, are required to quarantine, or because their income is otherwise affected,” said Michael Jennings, a spokesperson for Public Service Enterprise Group — the parent company of Public Service Electric and Gas Company, New Jersey’s largest utility — in a statement.

The company’s policy will be in place at least through the end of April, as will Atlantic City Electric’s, and other utilities such as PG&E's pandemic response included a similar moratorium during the outbreak.

“Curtailing shut-offs is good public policy to make sure New Jersey residents aren’t left in the lurch as they’re dealing with coronavirus,” said Eric Miller, director of the Natural Resources Defense Council’s New Jersey energy policy program. “Not having a safe place to be because you don't have electricity, gas or water doesn’t do anything to help address the coronavirus.”

Water service has also drawn attention. Major cities, including Atlanta and Detroit, have suspended shut-offs to ensure residents have water to wash their hands, while Texas utilities waived fees to support customers as well. Seattle suspended water and electric shutoffs.

American Water, which operates in 16 states and has 650,000 customers in New Jersey and 350,000 in New York, has halted any shutoffs amid the coronavirus pandemic and will also restore service, and similarly Hydro One reconnected customers in Canada to maintain access. New York City does not shut off service for nonpayment, but does issue liens against people’s property.

“Everyone, regardless as to what industry, has to have a heightened responsibility that’s encompassed in compassion and take everything into consideration,” New Jersey state Sen. Teresa Ruiz (D-Essex) told POLITICO. “Now is not the time to be worrying about late payments or bills. We need to get past this, hopefully, to see what we’re facing and then deal with other things.”

PSEG Long Island, a subsidiary of PSEG that handles day-to-day operations for the Long Island Power Authority, was the first New York utility to announce it is also suspending shutoffs before the governor’s announcement. The moratorium will remain in place through the end of April.

Rich Berkley, with the Public Utility Law Project, which advocates for low-income customers in New York, said he’s been in touch with state officials to make sure the issue of utility bills is considered during the pandemic. New York already has requirements for utilities to offer deferred payment agreements before shutting off service, he noted.

“The state has to act to protect the most vulnerable households first,” he said. “To the extent that the state is declaring areas of emergency, this should be part of the remedies the state deploys.”

But he noted that not everyone will have trouble paying their utility bills if they’re under quarantine.

“Given the background of a collapsing stock and equity market, all of which matters to the utilities, and shifts in electricity demand during COVID-19, we have to be careful about blanket moratoriums [on shutoffs] in New York,” Berkley said.

Con Edison, the largest utility in the state serving most of New York City, had already informed the Department of Public Service it will suspend all shut-offs in the one-mile radius New Rochelle containment area, spokesperson Michael Clendenin said on Thursday. The moratorium on shutoffs now includes its entire New York City and Westchester County territory.

Avangrid, which owns New York State Electric & Gas and Rochester Gas & Electric, serving broad swathes of upstate New York, will suspend shut-offs due to unpaid bills for 30 days, spokesperson Michael Jamison said.

 

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Beating Covid Is All About Electricity

Hospital Electricity Reliability underpins ICU operations, ventilators, medical devices, and diagnostics, reducing power outages risks via grid power and backup generators, while energy poverty and blackouts magnify COVID-19 mortality in vulnerable regions.

 

Key Points

Hospital electricity reliability is steady power that keeps ICU care, ventilators and medical devices operating.

✅ ICU loads: ventilators, monitors, infusion pumps, diagnostics

✅ Grid power plus backup generators minimize outage risk

✅ Energy poverty increases COVID-19 mortality and infection

 

Robert Bryce, Contributor

During her three-year career as a registered nurse, my friend, C., has cared for tuberculosis patients as well as ones with severe respiratory problems. She’s now caring for COVID-19 patients at a hospital in Ventura County, California, where debates about keeping the lights on continue amid the state’s energy transition. Is she scared about catching the virus? “No,” she replied during a phone call on Thursday. “I’m pretty unflappable.”

What would scare her? She quickly replied, “a power outage,” a threat that grows during summer blackouts when heat waves drive demand. About a year ago, while working in Oregon, the hospital she was working in lost power for about 45 minutes. “It was terrifying,” she said. 

C., who wasn’t authorized by her hospital to talk to the media, and thus asked me to only use the initial of her first name, said that COVID-19 patients are particularly reliant on electrical devices. She quickly ticked off the machines: “The bed, the IV machine, vital signs monitor, heart monitor, the sequential compression devices...” COVID-19 patients are hooked up to a minimum of five electrical devices, she said, and if the virus-stricken patient needs high-pressure oxygen or a ventilator, the number of electrical devices could be two or three times that number. “You name it, it plugs in,” she said.  

Today In: Energy

The virus has infected some 2.2 million people around the world and killed more than 150,000,including more than 32,000 people here in the U.S. While those numbers are frightening, it is apparent that the toll would be far higher without adequate supplies of reliable electricity. Modern healthcare systems depend on electricity. Hospitals are particularly big consumers. Power demand in hospitals is about 36 watts per square meter, which is about six times higher than the electricity load in a typical American home, and utilities are turning to AI to adapt to electricity demands during surges. 

Beating the coronavirus is all about electricity. Indeed, nearly every aspect of coronavirus detection, testing, and treatment requires juice. Second, it appears that the virus is more deadly in places where electricity is scarce or unreliable. Finally, if there are power outages in virus hotspots or hospitals, a real risk in a grid with more blackouts than other developed countries, the damage will be even more severe. 

As my nurse friend in Ventura County made clear, her ability to provide high-quality care for patients is wholly dependent on reliable electricity. The thermometers used to check for fever are powered by electricity. The monitors she uses to keep track of her patients, as well as her Vocera, the walkie-talkie that she uses to communicate with her colleagues, runs on batteries. Testing for the virus requires electricity. One virus-testing machine, Abbott Labs’ m2000, is a 655-pound appliance that, according to its specification sheet, runs on either 120 or 240 volts of electricity. The operating manual for a ventilator made by Hamilton Medical is chock full of instructions relating to electricity, including how to manage the machine’s batteries and alarms. 

While it may be too soon to make a direct connection between lack of electricity and the lethality of the coronavirus, the early signs from the Navajo reservation indicate that energy poverty amplifies the danger. The sprawling reservation has about 175,000 residents, but it has a higher death toll from the virus than 13 states. About 10 percent of Navajos do not have electricity in their homes and more than 30 percent lack indoor plumbing. 

The death rate from the virus on the reservation now stands at 3.4 percent, which is nearly twice the global average. In the middle of last week, the entire population of Native American tribes in the U.S. accounted for about 1,100 confirmed cases of the virus and about 44 deaths. Navajos accounted for the majority of those, with 830 confirmed cases of coronavirus and 28 deaths. 

On Saturday night, the Navajo Times reported a major increase, with 1,197 positive cases of COVID-19 on the reservation and 44 deaths. Other factors may contribute to the high infection and mortality rates on the reservation, including  high rates of diabetes, obesity, and crowded residential living situations. That said, electricity and water are essential to good hygiene and health authorities say that frequent hand washing helps cut the risk of contracting the virus. 

The devastation happening on Navajoland provides a window into what may happen in crowded, electricity-poor countries like India, Pakistan, and Bangladesh. It also shows what could happen if a tornado or hurricane were to wipe out the electric grid in virus hotspots like New Orleans, as extreme weather increasingly afflicts the grid nationwide. Sure, most American hospitals have backup generators to help assure reliable power. But those generators can fail. Further, they usually burn diesel fuel which needs to be replenished every few days. 

The essential point here is that our hospitals and critical health care machines aren’t running on solar panels and batteries. Instead, they are running on grid power that’s being provided by reliable sources — coal, natural gas, hydro, and nuclear power — which together produce about 89 percent of the electricity consumed in this country, even as Russian hacking of utilities highlights cyber risks. The pandemic — which is inflicting trillions of dollars of damage on our economy and tens of thousands of deaths — underscores the criticality of abundant and reliable electricity to our society and the tremendous damage that would occur if our health care infrastructure were to be hit by extended blackouts during the fight to stop COVID-19.

In a follow-up interview on Saturday with my friend, C., she told me that while caring for patients, she and her colleagues “are entirely dependent on electricity. We take it for granted. It’s a hidden assumption in our work,” a reminder echoed by a grid report card that warns of dangerous vulnerabilities. She quickly added she and her fellow nurses “aren’t trained or equipped to deal with circumstances that would come with shoddy power. If we lost power completely, people will die.”

 

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Zapping elderly brains with electricity improves short-term memory — for almost an hour

Transcranial electrical stimulation synchronizes brain waves to bolster working memory, aligning neural oscillations across the prefrontal and temporal cortex. This noninvasive brain stimulation may counter cognitive aging by restoring network coupling and improving short-term recall.

 

Key Points

Transcranial electrical stimulation applies scalp currents to synchronize brain waves, briefly enhancing working memory.

✅ Synchronizes prefrontal-temporal networks to restore coupling

✅ Noninvasive tES/tACS protocols show rapid, reversible gains

✅ Effects lasted under an hour; durability remains to be tested

 

To read this sentence, you hold the words in your mind for a few seconds until you reach the period. As you do, neurons in your brain fire in coordinated bursts, generating electrical waves that let you hold information for as long as it is needed, much as novel devices can generate electricity from falling snow under specific conditions. But as we age, these brain waves start to get out of sync, causing short-term memory to falter. A new study finds that jolting specific brain areas with a periodic burst of electricity might reverse the deficit—temporarily, at least.

The work makes “a strong case” for the idea that out-of-sync brain waves in specific regions can drive cognitive aging, says Vincent Clark, a neuroscientist at the University of New Mexico in Albuquerque, who was not involved in the research. He adds that the brain stimulation approach in the study may result in a new electrical therapy for age-related deficits in working memory.

Working memory is “the sketchpad of the mind,” allowing us to hold information in our minds over a period of seconds. This short-term memory is critical to accomplishing everyday tasks such as planning and counting, says Robert Reinhart, a neuroscientist at Boston University who led the study. Scientists think that when we use this type of memory, millions of neurons in different brain areas communicate through coupled bursts of activity, a form of electrical conduction that coordinates timing across networks. “Cells that fire together, wire together,” Reinhart says.

But despite its critical role, working memory is a fragile cognitive resource that declines with age, Reinhart says. Previous studies had suggested that reduced working-memory performance in the elderly is linked to uncoupled activity in different brain areas. So Reinhart and his team set out to test whether recoupling brain waves in older adults could boost the brain’s ability to temporarily store information, a systems-level coordination challenge akin to efforts to use AI for energy savings on modern power grids.

To do so, the researchers used jolts of weak electrical current to synchronize waves in the prefrontal and temporal cortex—two brain areas critical for cognition, a targeted approach not unlike how grids use batteries to stabilize power during strain—and applied the current to the scalps of 42 healthy people in their 60s and 70s who showed no signs of decline in mental ability. Before their brains were zapped, participants looked at a series of images: an everyday object, followed briefly by a blank screen, and then either an identical or a modified version of the same object. The goal was to spot whether the two images were different.

Then the participants took the test again, while their brains were stimulated with a current. After about 25 minutes of applying electricity, participants were on average more accurate at identifying changes in the images than they were before the stimulation. Following stimulation, their performance in the test was indistinguishable from that of a group of 42 people in their 20s. And the waves in the prefrontal and temporal cortex, which had previously been out of sync in most of the participants, started to fire in sync, the researchers report today in Nature Neuroscience, a synchronization imperative reminiscent of safeguards that prevent power blackouts on threatened grids. No such effects occurred in a second group of older people who received jolts of current that didn’t synchronize waves in the prefrontal and temporal cortex.

By using bursts of current to knock brain waves out of sync, the researchers also modulated the brain chatter in healthy people in their 20s, making them slower and less accurate at spotting differences in the image test.

“This is a very nice and clear demonstration of how functional connections underlie memory in younger adults and how alterations … can lead to memory reductions in older adults,” says Cheryl Grady, a cognitive neuroscientist at the Rotman Research Institute at Baycrest in Toronto, Canada. It’s also the first time that transcranial stimulation has been shown to restore working memory in older people, says Michael O’Sullivan, a neuroscientist at the University of Queensland in Brisbane, Australia, though electricity in medicine extends far beyond neurostimulation.

But whether brain zapping could turbocharge the cognitive abilities of seniors or help improve the memories of people with diseases like Alzheimer’s is still unclear: In the study, the positive effects on working memory lasted for just under an hour—though Reinhart says that’s as far as they recorded in the experiment. The team didn’t see the improvements decline toward the end, so he suspects that the cognitive boost may last for longer. Still, researchers say much more work has to be done to better understand how the stimulation works.

Clark is optimistic. “No pill yet developed can produce these sorts of effects safely and reliably,” he says. “Helping people is the ultimate goal of all of our research, and it’s encouraging to see that progress is being made.”

 

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