“I look at the data from Euclid as it comes in,” explains Bruno. “Even from that first observation, I could see it, but after Euclid made more observations of the area, we could see a perfect Einstein ring. For me, with a lifelong interest in gravitational lensing, that was amazing.”

The Einstein Ring, an extremely rare phenomenon, turned out to be hiding in plain sight in a galaxy not far away. The galaxy, called NGC 6505, is around 590 million light-years from Earth, a stone’s throw away in cosmic terms. But this is the first time that the ring of light surrounding its centre is detected, thanks to Euclid’s high-resolution instruments.

The ring around the foreground galaxy is made up of light from a farther out bright galaxy. This background galaxy is 4.42 billion light-years away, and its light has been distorted by gravity on its way to us. The far-away galaxy hasn’t been observed before and doesn’t yet have a name.

“An Einstein ring is an example of strong gravitational lensing,” explains Conor O’Riordan, of the Max Planck Institute for Astrophysics, Germany, and lead author of the first scientific paper analysing the ring. “All strong lenses are special, because they’re so rare, and they’re incredibly useful scientifically. This one is particularly special, because it’s so close to Earth and the alignment makes it very beautiful.”

Albert Einstein’s general theory of relativity predicts that light will bend around objects in space, so that they focus the light like a giant lens. This gravitational lensing effect is bigger for more massive objects — galaxies and clusters of galaxies. It means we can sometimes see the light from distant galaxies that would otherwise be hidden.

If the alignment is just right, the light from the distant source galaxy bends to form a spectacular ring around the foreground object. These Einstein rings are a rich laboratory for scientists. Studying their gravitational effects can help us learn about the expansion of the Universe, detect the effects of invisible dark matter and dark energy, and investigate the background source whose light is bent by dark matter in between us and the source.

“I find it very intriguing that this ring was observed within a well-known galaxy, which was first discovered in 1884,” says Valeria Pettorino, ESA Euclid Project Scientist. “The galaxy has been known to astronomers for a very long time. And yet this ring was never observed before. This demonstrates how powerful Euclid is, finding new things even in places we thought we knew well. This discovery is very encouraging for the future of the Euclid mission and demonstrates its fantastic capabilities.”

By exploring how the Universe has expanded and formed over its cosmic history, Euclid will reveal more about the role of gravity and the nature of dark energy and dark matter. The space telescope will map more than a third of the sky, observing billions of galaxies out to 10 billion light-years. It is expected to find around 100 000 strong lenses, but to find one that’s so spectacular — and so close to home — is astonishing. Until now, less than 1000 strong lenses were known, and even fewer were imaged at high resolution.

“Euclid is going to revolutionise the field, with all this data we’ve never had before,” adds Conor.

Although this Einstein ring is stunning, Euclid’s main job is searching for the more subtle effects of weak gravitational lensing, where background galaxies appear only mildly stretched or displaced. To detect this effect, scientists will need to analyse billions of galaxies. Euclid began its detailed survey of the sky on 14 February 2024 and is gradually creating the most extensive 3D map of the Universe yet. Such an amazing find, so early in its mission, means Euclid is on course to uncover many more hidden secrets.

Despite occupying just 5 per cent of the region’s terrestrial land, these ecosystems play an outsized role in emission reduction efforts, making them crucial for meeting climate targets across ASEAN countries.

The research study, conducted by an international team of scientists from NUS, with contributions from Nanyang Technological University, Singapore (NTU Singapore) and James Cook University in Australia, highlights the significant climate benefits of conserving and restoring peatlands and mangroves.

Together, these ecosystems store more than 90 per cent of their carbon in soils rather than vegetation, making them among the most efficient natural carbon sinks globally.

However, when disrupted or destroyed through activities such as land-use changes, these ecosystems release significant amounts of carbon into the atmosphere, posing a major challenge to achieving emission reduction targets.

Additionally, peatland degradation during dry periods, such as those associated with El Niño events, not only results in massive carbon emissions but also contributes to regional haze events, affecting air quality in countries including Singapore.

Associate Professor Massimo Lupascu, Principal Investigator and the paper’s senior author, explained, “If we conserved and restored the carbon-dense peatlands and mangroves in Southeast Asia, we could mitigate approximately 770 megatonnes of CO2 equivalent (MtCO2e) annually, or nearly double Malaysia’s national greenhouse gas emissions in 2023.”

“Our research underscores the immense climate benefits of protecting these ecosystems, making them a pragmatic and effective natural climate solution for ASEAN countries,” said Assoc Prof Lupascu, who is from the Department of Geography at the NUS Faculty of Arts and Social Sciences.

Professor David Taylor, a co-author of the paper and Head of the NUS Department of Geography, said that “including both peatlands and mangroves in the new Nationally Determined Contributions (NDCs 3.0) that countries signed up to the Paris Agreement must update and re-commit to every five years can certainly contribute to increasing the ambition of countries across the region through the setting of higher emissions reduction targets, although this would involve substantial investment in effective conservation and restoration.” “

Unique ecosystems with global implications

Southeast Asia is home to some of the world’s largest areas of tropical peatlands and mangroves. These ecosystems share water-saturated, oxygen-limited soils that slow the decomposition of organic matter, enabling them to act as natural carbon sinks when undisturbed.

However, this soil-stored carbon is “irrecoverable,” meaning it cannot easily be replaced once lost to human activities, such as agriculture or urban development.

Assistant Professor Pierre Taillardat, a co-author of the paper and principal investigator at the Wetland Carbon Lab at the Asian School of the Environment, NTU Singapore, emphasised the transformative potential of wetland conservation and how it can also yield economic benefits through schemes like carbon credits.

“Wetland soils may have little agronomic value, as it is generally not well-suited for traditional farming or crop cultivation, but they are unmatched in their ability to store and preserve carbon,” added Asst Prof Taillardat.

“If carbon were valued like other critical commodities, such as being traded on the carbon credits market, it could unlock vast opportunities for conservation and restoration projects. This will enable local communities to lead carbon management efforts with a win-win scenario where livelihoods and sustainable ecosystems thrive together.”

Updated Emissions Estimates and Pathways for Change

The study also provides up-to-date estimates of emissions from disturbed peatlands and mangroves across Southeast Asia from 2001 to 2022, broken down by land-use type and country.

By doing so, it offers policymakers critical data to identify hotspots for intervention and prioritise conservation efforts.

In their paper, the researchers call for ASEAN governments to integrate peatland and mangrove conservation into national climate strategies.

Given their high carbon storage capacity and the ability to mitigate land-use emissions, peatlands and mangroves represent a cost-effective and impactful approach to achieving net-zero targets.

By conserving and restoring these ecosystems, Southeast Asian nations can reduce emissions, bolster climate resilience, and support local communities that depend on wetlands for their livelihoods.

Dr Sigit Sasmito, from TropWATER, James Cook University in Brisbane, Australia, who is the study’s first author and led the work when he was a Research Fellow in the NUS Department of Geography, remarked, “By investing in the conservation of peatlands and mangroves, Southeast Asia can lead the world in deploying cost-effective, nature-based solutions that deliver enduring climate and biodiversity benefits. These ecosystems pack a climate mitigation punch far beyond their size, offering one of the most scalable and impactful natural solutions to combat the planet’s climate crisis.”

These results give hope to stroke patients worldwide who may not be able to access clot-dissolving medications within the approved time window, which in China is within 4.5 hours, said the trial’s principal investigator Min Lou, M.D., Ph.D., a professor at the Second Affiliated Hospital of Zhejiang University’s School of Medicine in China.

In the U.S., alteplase is approved to treat stroke within three hours of symptom onset and is recommended for use up to 4.5 hours for select patients. Other research has indicated it may also work well in some patients 4.5 to 9 hours after stroke onset.

The American Heart Association/American Stroke Association 2019 Guidelines for the Early Management of Patients with Acute Ischemic Stroke note that IV alteplase within 4.5 hours of stroke onset is the standard of care for most ischemic stroke patients in the United States.

Researchers enrolled 372 stroke patients whose symptoms began 4.5 hours to 24 hours earlier. They used widely available CT perfusion imaging (advanced brain scanning) to confirm that these patients still had brain tissue that could recover with treatment. Participants were randomly split into two groups — one group received the clot-busting medication alteplase, while the other received standard stroke care of antiplatelet therapy at the discretion of the investigator, based on the Chinese Guidelines for Diagnosis and Treatment of Acute Ischemic Stroke 2018. Functional recovery was assessed at 90 days.

“We believe these findings mean more people may return to normal or near-normal lives after a stroke, even if they receive treatment later than originally thought beneficial,” Lou said. “This method of treatment could become the new standard, especially in hospitals that use CT perfusion imaging. This technology helps health care professionals see how blood flows in different parts of the brain after an ischemic stroke. This could extend treatment eligibility to millions more patients across the globe.”

The study found:

• 40% of participants treated with alteplase had little to no disability after 90 days, compared to 26% of those who received standard care — a 54% higher chance of functional recovery.
• Less than 3% of participants in either group received rescue mechanical clot removal as an additional treatment.
• Rates of death were the same (10.8%) for both groups.
• The risk of brain bleeding was higher among those who received alteplase than among participants who did not (3.8% vs. 0.5%), but researchers believe this is a manageable risk.

“We also need to look more closely at how safe and effective other clot-dissolving medications, like tenecteplase, are when given after a stroke, especially beyond the usual time frames. It’s also important to learn if our findings apply to other groups of people, especially in areas with different stroke risks and health care resources,” Lou explained.

Study limitations include the that both participants and researcher knew which treatment was being given, which could have introduced bias, and results may not be generalizable to patients outside of China.

Study design, background and details:

• The study enrolled 372 stroke patients in a multicenter, prospective, randomized trial at 26 stroke centers in China.
• The patient’s average age was 72 years, and 43% were women.
• The trial used widely available CT perfusion imaging software to gauge salvageable brain tissue, making the findings more applicable to real-world clinical settings.
• Enrolled patients were assigned to the alteplase group or a standard medical treatment group.
• The primary outcome was a score of 0 or 1 on the modified Rankin scale, which scores disability from 0 (no symptoms) to 6 (death) at 90 days.

The Ray Laboratory, led by Department of Biological Sciences Professor and Associate Chair David Ray, as part of a study on bat genomes published by the scientific journal Nature, helped identify the components of a genome in a specific species of bats that have shown more genetic adaptations in their immune systems than other animals.

The study revealed that a gene common in some bats can reduce the production of the SARS-CoV-2 virus by up to 90%, which could help lead to new medical approaches to combating viral diseases.

“Bats have an amazing ability to resist some of the worst effects of viral infection that make us so vulnerable to certain diseases,” Ray said. “While we get very sick, the bats barely blink an eye when exposed to the same pathogens.”

Ray said his laboratory aided in the annotation of the genome assemblies in the bats. Genome annotation is how scientists characterize all component parts of the genome — the genes, regulatory sequences and non-coding and coding regions. The Texas Tech lab identified the transposable element (TE) regions of the assemblies, where bits of DNA can create new copies of themselves and introduce variations within the genome.

Ray said bats have a unique TE repertoire among mammals, presenting a potentially powerful way to generate new genetic pathways to deal with pathogens like the coronavirus.

“If every individual of a species was genetically identical, they would all have the same risk associated with infection — if one dies, they all die,” Ray said. “TEs are a great way for organisms to generate genetic diversity in the species, allowing some individuals to survive better in the face of environmental pressures like viral diseases.”

This study is part of a larger international project called Bat1K, which is attempting to sequence and assemble the genomes of every living bat species, numbering around 1,500, according to Ray. It was led by the Senckenberg Research Institute and Natural History Museum in Frankfurt, Germany.

Michael Hiller, a professor of comparative genomics at the Goethe University and a member of the Senckenberg Institute is one of the main investigators in the study. He and Ray are both members of the executive board for the Bat1K consortium, and their relationship provided the perfect opportunity for Ray’s lab to collaborate with the international scientific community.

The lab studies genomes and genome evolution with an emphasis on TEs. Their past studies have included genome research on bats and other mammals, crocodiles and various insects. The lab has worked with entities in the past such as the National Science Foundation, the U.S. Department of Agriculture, the state of Texas and the Texas Department of Wildlife and Fisheries.

Researchers in this recent study paid particular attention to the ISG15 gene, which is associated with a severe course of COVID-19 in humans. Bats are known to carry numerous viruses, including those transmissible to humans, but do not show any symptoms of disease when infected.

The ISG15 gene from the bats, the study showed, is able to reduce production of the SARS CoV-2 virus by 80-90%. By contrast, the ISG15 gene from a human genome showed no antiviral effect in this study.

“Thus, the ISG15 gene is likely one of several factors that contribute to viral disease resistance in bats,” Hiller said. “These promising results can be used as a basis for further experimental studies, which are necessary to decipher the unique adaptations of the bats’ immune system.”

The timing couldn’t be more critical. With more than a quarter of U.S. homes already fully electric, and solar installations set to triple during the next five years, understanding vulnerabilities has become critical for emergency planning and public safety.

“We’re racing toward electrification to combat climate change, but we must also understand the risks involved,” says Stevens professor Philip Odonkor, who led the research project. “So, what happens to these solar and electric homes when the power goes out?”

Summer strength, winter blues

Odonkor, with recent graduates and AI summer fellows Andrew Majowicz M.Eng. ’24 and Chetan Popli M.S. ’24, set out to answer that question.

In a new study published in the Journal of Smart Cities and Society, they explore the future of electrified American homes by leveraging AI and analyzing Department of Energy (DOE) building-stock data.

The team dug deep into the energy patterns of 129,000 single-family homes across eight states. Their goal? Uncover the hidden energy “signatures” that distinguish fully electrified homes — those powered entirely by electricity — from those that use a mix of energy sources.

They didn’t stop there, however. For identified mixed-energy homes, the team also worked to pinpoint exactly which appliances have made the shifts to electric power and which haven’t.

After processing and analyzing the dataset, Odonkor’s team found that homes’ energy signatures were not only distinguishable, but they also granted critical insights into the resilience of individual homes.

Solar-powered homes, for example, demonstrated impressive resilience during summer heat waves. However, they proved remarkably vulnerable during winter storms; in fact, fully electrified homes were nearly three times more vulnerable to winter outages, compared to those drawing power from mixed energy sources.

“Think about Texas in 2021, when millions lost power during a winter storm,” Odonkor explains. “As more homes go fully electric, we need to prepare for these scenarios.” “Solar panels help in summer, but they can’t meet the intense heating demands that occur during winter blackouts.”

New methods to inform planning and response

The study wasn’t only pathbreaking for its findings; it was only notable for the innovative AI-powered methods that were used to conduct the analyses.

Odonkor’s team developed novel machine-learning models capable of identifying an individual home’s energy systems and vulnerabilities with over 95% accuracy, using only its energy-consumption patterns. The new approach enables utilities and emergency responders to pinpoint at-risk households across entire neighborhoods, without the need for invasive surveys or inspections.

“Until now, we actually had to go door-to-door to determine if a home was fully electric,” notes Odonkor. “Now, we can automatically identify the most vulnerable homes while still safeguarding people’s privacy.” “This will shift the way we prepare for and respond to extreme weather, enabling faster, and more targeted action when it’s needed most.”

The study’s potential benefits extend beyond empowering individual homeowners. As cities work to build climate resilience, these new tools could help community emergency-service units prioritize responses during outages. It could also assist urban planners in the long-term development of more resilient housing stock and neighborhoods.

That’s key, because communities nationwide are grappling with a one-two punch of aging power grids subjected to more frequent episodes of severe weather.

As we increasingly transition to electric homes to cope with climate change, the team’s findings serve as a warning that we will need implement strategies that protect vulnerable solar and electric households during winter emergencies.

“The path to sustainable cities isn’t just about going green; it’s about staying resilient,” he emphasizes. “As we shape the future of urban housing, understanding vulnerabilities isn’t just a luxury — it’s essential to keeping communities safe.”

A new review paper, published in Science on February 7, 2025, highlights these changes and their far-reaching implications. The paper, “Disappearing landscapes: The Arctic at +2.7°C global warming,” was led byJulienne Stroeve, senior research scientist at the National Snow and Ice Data Center (NSIDC) and professor at the Centre for Earth Observation Science at the University of Manitoba.

“The Arctic is warming at four times the rate of the rest of the planet,” said Stroeve. “At 2.7 degrees Celsius of global warming, we will see more extreme and cascading impacts in this region than elsewhere, including sea-ice-free Arctic summers, accelerated melting of the Greenland Ice Sheet, widespread permafrost loss, and more extreme air temperatures. These changes will devastate infrastructure, ecosystems, vulnerable communities, and wildlife.”

In the review paper, the authors used the Sixth Assessment Report of the United Nations Intergovernmental Panel on Climate Change as a starting point. They updated knowledge from the report about three specific areas of the Arctic environment, including sea ice, the Greenland Ice Sheet and permafrost, focusing on existing studies that show consensus about the changes that will take place in the region.

Under 2.7 degrees Celsius of warming, the Arctic region is likely to experience the following effects:

• Virtually every day of the year will have air temperatures exceeding pre-industrial temperature extremes.
• The Arctic Ocean will be free of sea ice for several months each summer.
• The area of the Greenland Ice Sheet that experiences more than a month of surface temperatures above 0 degrees Celsius will quadruple compared with pre-industrial conditions, causing global sea levels to rise faster.
• Surface-level permafrost will decrease by 50 percent of pre-industrial levels.

“Our paper shows that, already today, mankind has the power to wipe out entire landscapes from the surface of our planet,” said Dirk Notz, professor for polar research at the University of Hamburg and co-author of the study. “It’d be amazing if we could become more aware of this power and the responsibility that goes with it, as the future of the Arctic truly lies in our hands.”

Other co-authors on the paper included Jackie Dawson of the University of Ottawa, Edward A.G. Schuur of Northern Arizona University, Dorthe Dahl-Jensen of the University of Manitoba and University of Copenhagen, and Céline Giesse of the University of Hamburg. Funding came from several sources, with the largest piece of Stroeve’s funding from the Canada 150 Research Chairs Program, C150 grant 50296. Data and information from NSIDC’s Sea Ice Today and Ice Sheets Today projects were used in the review.