For five years, the surface of the Amery Ice Shelf in Antarctica remained still, or so it appeared. But when scientists analyzed satellite radar data from the European Space Agency's Sentinel-1 missions, a different picture emerged. Between 2016 and 2021, a massive subglacial lake beneath the ice shelf drained approximately 78 million cubic meters of water. The loss was not a sudden collapse, but a slow, systematic transfer that left a measurable imprint on the ice above: a circular depression roughly 61 square kilometers in area, where the ice had settled under its own weight as the support from below disappeared.
The discovery, led by researchers at Kangwon National University, offers a clearer view of how water moves beneath the continent's frozen crust. The team did not detect the water directly; instead, they identified the change by monitoring the vertical displacement of the ice surface. As the lake emptied, the ice above it subsided, creating a distinct topographical anomaly. This indirect method is crucial because drilling or direct observation in such remote, deep, and hostile environments is technically impractical and scientifically limited.
A Connected System, Not Isolated Pools
The key finding is not just that water was lost, but where it went. The data indicate that the water did not burst through the ice to reach the open ocean. Instead, it flowed laterally into neighboring subglacial cavities. This behavior confirms a long-held hypothesis: the subglacial hydrology of Antarctica is not a collection of isolated, static lakes, but a dynamic, interconnected network of channels and reservoirs.
In a metal, electrons are typically expected to behave like waves spreading freely across the crystal lattice, similar to ripples on the surface of a calm ocean. However, researchers at Columbia University have captured evidence of a phenomenon that defies this intuition: electronic waves trapped at a single point. This observation occurred in the metal Pd5AlI2, where, despite the presence of pathways for movement, electronic states ceased to propagate. A publication in the journal Science marks the first experimental confirmation of a long-standing theoretical prediction: the existence of a bound state in the continuum (BIC) within a metallic material.
The key evidence consists of spectroscopic images obtained through atomic scanning. These snapshots reveal localized electronic waves surrounding atomic defects in the lattice. Previously, this form of quantum interference trapping had been demonstrated only for photons. For electrons in a metal, it remained a hypothesis.
The finding indicates that destructive interference is capable of completely suppressing electron propagation, even if other states in the same material continue to move freely.
A molecular screw can be forced to rotate using only an electric current, but the most striking observation is not the movement itself-it is the relationship between that motion and the flow of electricity. In a discovery involving the molecule dithioacetylhelicene, researchers found that the molecule's ability to conduct electricity increases by two orders of magnitude specifically when it begins to rotate. In a static state, the molecule naturally adopts spatial configurations that hinder the flow of electrons; rotation is not a byproduct of the current, but a necessary condition for the current to flow efficiently.
The Mechanism of Molecular Rotation
The experimental setup involves a dithioacetylhelicene molecule-a spiral structure-tethered between two atomically thin gold electrodes via sulfur atoms. While traditional molecular motors often require external manipulation, such as the tip of a scanning tunneling microscope, this system is driven by the voltage difference between the electrodes. As electrons pass through the spiral structure, they transfer angular momentum to the molecule, effectively acting like a ball striking a pinwheel to initiate rotation.
The researchers demonstrated precise control over this movement: by simply reversing the polarity of the applied voltage, they could switch the direction of the molecule's rotation. This establishes the device as a current-driven molecular motor with a reversible directional trigger.
There are more than 8,000 species of amphibians on Earth, and not one of them lives in the sea. Fewer than 2% tolerate any salt at all, and even those have limits. It is a striking gap. Whales, sea turtles and penguins each show that mammals, reptiles and birds can live at sea, with no […]
When the James Webb Space Telescope began photographing galaxies from the universe’s earliest chapters, astronomers ran into a problem. There were more very bright galaxies than their models predicted, and some looked far too massive for such a young cosmos. Part of that puzzle has since faded. Some of those objects turned out to be […]
Some studies have linked disgust sensitivity to socially conservative attitudes. But ahead of the US midterm elections, does disgust shape our politics, or do our beliefs shape what we find disgusting?
Between 34,000 and 25,000 years ago, much of Europe shared a way of life that archaeologists call the Gravettian. It is recognized by its stone and bone tools, by the way people buried their dead, and by small carved figurines of women known as Venus figurines. They turn up from the Atlantic side of the […]
In the dense forests of Brazil, a quiet genetic drift was dismantling the most reliable tool used to detect a deadly virus. For three decades, since its first identification in 1990, the Sabia virus has circulated in the region, causing severe hemorrhages and brain damage. Yet, in recent years, it began to disappear from laboratory results. Patients died of the infection while their blood tests returned negative, not because the medical staff missed the diagnosis, but because the virus itself had quietly altered the genetic lock that standard tests were designed to pick.
The failure was not a result of human error or equipment malfunction, but a specific consequence of viral evolution. Standard diagnostic methods, such as PCR (polymerase chain reaction), rely on primers-short sequences of molecules that act like keys. They must bind perfectly to specific regions of the viral DNA to trigger a detectable reaction. Over thirty years of circulation, the Sabia virus accumulated mutations precisely at these binding sites. The code changed, the lock was effectively swapped, and the old keys no longer turned. The result was a pathogen that remained present in the blood, invisible to the very instruments meant to find it.
The Unseen Patient
The puzzle came into focus when researchers at the University of São Paulo (FM-USP) investigated two fatal cases from 2019 and 2020 that defied standard diagnosis. One of the victims was a 52-year-old man with a history of hiking in wooded areas. He was hospitalized with symptoms suggestive of yellow fever, but standard screenings, including tests for Sabia virus, came back negative. Recognizing that a standard panel might have missed the culprit, the team turned to metagenomics. Unlike targeted tests that look for a specific signature, metagenomic sequencing reads all the genetic material in a blood sample and compares it against vast databases of known pathogens.
Line up human and chimpanzee DNA and the first surprise is how little separates us. We share more than 96% of the sequences used to make proteins, the molecules that build and run a living body. And yet the human brain is roughly three times the size of a chimpanzee’s, and it does things a […]
These elusive and reactive particles have been challenging to hold on to and even more challenging to study, but a new method paves the way for tests on the differences between matter and antimatter.
While oil is known to float, new research finds that over time it can permeate even extremely deep marine habitats, with animal populations declining by as much as 80 percent.
Paris Marx, author of Hyperscale, has been tracking global data center development for years. The US has a lot to learn from what’s happened everywhere from Ireland to New Zealand.
When an electron meets a positron, both vanish. Their mass turns into energy and nothing is left of either particle. That is the main reason positrons are so hard to study. There is no jar to keep them in, because the walls of any container are made of ordinary matter, and a single touch would […]
The vaccine is personalized to a patient’s tumor, and results from the Phase 3 trial are yet another example of the promise of mRNA vaccines in treating cancer.
The Webb telescope sees tiny red dots everywhere. Astronomers can’t agree on what they are, but some believe they may be enormous stars with black holes inside.
Chimp friendships are largely initiated by grooming. They are “popping pimples; they’re looking at little scabs; they’re scratching things,” Dr. Lewis said, behaviors that release bonding hormones like oxytocin.
About 2,000 years ago, while Augustus ruled Rome, a leftover patch of ice in the Canadian Arctic stopped shrinking and began to grow. A team from the Lamont-Doherty Earth Observatory, part of Columbia University, argues that this turning point marked the beginning of the next glaciation, what most people would call the next ice age. […]
What happens when your name evokes laughter or ridicule? Research points to negative life outcomes, but some people learn to embrace unfortunate names.
People succumbed to heat at highest rates in Malta, Italy and Hungary, with health issues, loneliness and poverty exacerbating toll
Heat killed a record 50,000 people in European cities this summer, new research suggests, with scientists blaming climate breakdown for two in every three of the deaths.
Morgues and funeral homes filled with bodies from June to August as the heat added by planet-baking pollution cut short an extra 32,000 lives in urban areas, the researchers found. Hot days pushed vulnerable bodies into overdrive and warm nights prevented them from recovering.
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