The mysterious X-37B space-plane — the U.S. military's orbital test vehicle — "serves partly as a platform for cutting-edge experiments," writes Space.com

And "one of these experiments is a potential alternative to GPS that makes use of quantum science as a tool for navigation: a quantum inertial sensor." This technology could revolutionize how spacecraft, airplanes, ships and submarines navigate in environments where GPS is unavailable or compromised. In space, especially beyond Earth's orbit, GPS signals become unreliable or simply vanish. The same applies underwater, where submarines cannot access GPS at all. And even on Earth, GPS signals can be jammed (blocked), spoofed (making a GPS receiver think it is in a different location) or disabled — for instance, during a conflict... Traditional inertial navigation systems, which use accelerometers and gyroscopes to measure a vehicle's acceleration and rotation, do provide independent navigation, as they can estimate position by tracking how the vehicle moves over time... Eventually though, without visual cues, small errors will accumulate and you will entirely lose your positioning...

At very low temperatures, atoms obey the rules of quantum mechanics: they behave like waves and can exist in multiple states simultaneously — two properties that lie at the heart of quantum inertial sensors. The quantum inertial sensor aboard the X-37B uses a technique called atom interferometry, where atoms are cooled to the temperature of near absolute zero, so they behave like waves. Using fine-tuned lasers, each atom is split into what's called a superposition state, similar to Schrödinger's cat, so that it simultaneously travels along two paths, which are then recombined.

Since the atom behaves like a wave in quantum mechanics, these two paths interfere with each other, creating a pattern similar to overlapping ripples on water. Encoded in this pattern is detailed information about how the atom's environment has affected its journey. In particular, the tiniest shifts in motion, like sensor rotations or accelerations, leave detectable marks on these atomic "waves". Compared to classical inertial navigation systems, quantum sensors offer orders of magnitude greater sensitivity. Because atoms are identical and do not change, unlike mechanical components or electronics, they are far less prone to drift or bias. The result is long duration and high accuracy navigation without the need for external references.

The upcoming X-37B mission will be the first time this level of quantum inertial navigation is tested in space.
The article points out that a quantum navigation system could be crucial "for future space exploration, such as to the Moon, Mars or even deep space," where autonomy is key and when signals from Earth are unavailable.

"While quantum computing and quantum communication often steal headlines, systems like quantum clocks and quantum sensors are likely to be the first to see widespread use."

"Only a tiny fraction of the more than 7,000 languages on Earth are supported by artificial intelligence models," reported SiliconANGLE this week. So Nvidia announced "a massive new AI-ready dataset and models to support the development of high-quality AI translation for European languages." The new dataset, named Granary, is a massive open-source corpus of multilingual audio, including more than a million hours of audio, plus 650,000 hours of speech recognition and 350,000 hours of speech translation. Nvidia's speech AI team collaborated with researchers from Carnegie Mellon University and Fondazione Bruno Kessler to process unlabeled audio and public speech data into information usable for AI training... Granary includes 25 European languages, representing nearly all of the European Union's 24 official languages, plus Russian and Ukrainian. The dataset also contains languages with limited available data, such as Croatian, Estonian and Maltese. This is critically important because providing these underrepresented human-annotated datasets will enable developers to create more inclusive speech technologies for audiences who speak those languages, while using less training data in their AI applications and models... The team demonstrated in their research paper that, compared to other popular datasets, it takes around half as much Granary training data to achieve high accuracy for automatic speech recognition and automatic speech translation.

Alongside Granary, Nvidia also released new Canary and Parakeet models to demonstrate what can be created with the dataset... The new Canary is available under a fairly permissive license for commercial and research use, expanding Canary's current languages from four to 25. It offers transcription and translation quality comparable to models three times larger while running inference up to 10 times faster. At 1 billion parameters, it can run completely on-device on most next-gen flagship smartphones for speech translation on the fly.

alternative_right shares a report from Phys.org: All the critical minerals the U.S. needs annually for energy, defense and technology applications are already being mined at existing U.S. facilities, according to a new analysis published in the journal Science. The catch? These minerals, such as cobalt, lithium, gallium and rare earth elements like neodymium and yttrium, are currently being discarded as tailings of other mineral streams like gold and zinc, said Elizabeth Holley, associate professor of mining engineering at Colorado School of Mines and lead author of the new paper.

To conduct the analysis, Holley and her team built a database of annual production from federally permitted metal mines in the U.S. They used a statistical resampling technique to pair these data with the geochemical concentrations of critical minerals in ores, recently compiled by the U.S. Geological Survey, Geoscience Australia and the Geologic Survey of Canada. Using this approach, Holley's team was able to estimate the quantities of critical minerals being mined and processed every year at U.S. metal mines but not being recovered. Instead, these valuable minerals are ending up as discarded tailings that must be stored and monitored to prevent environmental contamination.

The analysis looks at a total of 70 elements used in applications ranging from consumer electronics like cell phones to medical devices to satellites to renewable energy to fighter jets and shows that unrecovered byproducts from other U.S. mines could meet the demand for all but two -- platinum and palladium. Among the elements included in the analysis are:
- Cobalt (Co): The lustrous bluish-gray metal, a key component in electric car batteries, is a byproduct of nickel and copper mining. Recovering less than 10% of the cobalt currently being mined and processed but not recovered would be more than enough to fuel the entire U.S. battery market.
- Germanium (Ge): The brittle silvery-white semi-metal used for electronics and infrared optics, including sensors on missiles and defense satellites, is present in zinc and molybdenum mines. If the U.S. recovered less than 1% of the germanium currently mined and processed but not recovered from U.S. mines, it would not have to import any germanium to meet industry needs.

Solar panels in space could cut Europe's terrestrial renewable energy needs by 80% by 2050, a study has found. The Guardian: Using a detailed computer model of the continent's future power grid, the researchers found that a system of space-based panels designed by Nasa could reduce the cost of the whole European power system by as much as 15%. It could also cut battery use by more than two-thirds.

The study, led by researchers at King's College London, is the first to assess the possible impact of space solar energy on Europe. The space-based solar power (SBSP) panels that yielded the positive results uses a heliostat design. The design, which the system imitates, uses mirror-like reflectors to collect sunlight in orbit. The sunlight is then transmitted to stations on Earth and converted to electricity before it is delivered to an energy grid. The computer model of the continent's power grid spans 33 countries, and simulates electricity demand, generation and storage to identify the lowest-cost option to meet Europe's electricity needs.

The melting of sea ice in the Arctic has slowed dramatically in the past 20 years, scientists have reported, with no statistically significant decline in its extent since 2005. From a report: The finding is surprising, the researchers say, given that carbon emissions from fossil fuel burning have continued to rise and trap ever more heat over that time. They said natural variations in ocean currents that limit ice melting had probably balanced out the continuing rise in global temperatures. However, they said this was only a temporary reprieve and melting was highly likely to start again at about double the long-term rate at some point in the next five to 10 years.

The findings do not mean Arctic sea ice is rebounding. Sea ice area in September, when it reaches its annual minimum, has halved since 1979, when satellite measurements began. The climate crisis remains "unequivocally real," the scientists said, and the need for urgent action to avoid the worst impacts remains unchanged. The natural variation causing the slowdown is probably the multi-decadal fluctuations in currents in the Atlantic and Pacific oceans, which change the amount of warmed water flowing into the Arctic. The Arctic is still expected to see ice-free conditions later in the century, harming people and wildlife in the region and boosting global heating by exposing the dark, heat-absorbing ocean.

Global fertility rates have fallen from five children per woman in the mid-twentieth century to 2.2 today, with approximately half of countries now below the 2.1 replacement threshold, according to data from the Institute for Health Metrics and Evaluation at the University of Washington.

Mexico's rate dropped from seven children in 1970 to 1.6 in 2023. South Korea recorded 0.75 in 2024, down from 4.5 in 1970. The IHME projects over three-quarters of countries will fall below replacement level by 2050. A UN survey of 14,000 people across 14 countries found 39% cited financial limitations as a primary reason for not having children. China's population peaked around 2022 at 1.4 billion, while the U.S. Census Bureau predicts America's population will peak in 2080 at 370 million.

England has declared a "nationally significant" water shortage as reservoirs dropped to 67.7% capacity, their lowest levels in at least a decade. The UK Centre for Ecology and Hydrology warned of exceptionally low river flows while groundwater continues dwindling across the country. Hosepipe bans now affect all of England, with additional restrictions probable in coming months.

Water companies lose approximately one trillion litres annually through leaky pipes -- 20% of all treated water -- while the annual pipe replacement rate remains at 0.05%. No new reservoir has been built in 30 years despite population growth. Government forecasts project England's public water supply could fall short by 5 billion litres daily by 2055 without urgent infrastructure investment. The economic cost of water scarcity could reach $11.48 billion over this parliament, according to thinktank Public First.

Take a look at what being called "a stunning phenomenon," captured in a photo taken from the International Space Station as it passed above a thunderstorm over Mexico and the American Southwest.

So what was it? "A rare form of Transient Luminous Event (TLE) called a gigantic jet," according to a new blog post at Notebookcheck.net: A gigantic jet happens above thunderstorms, firing powerful bursts of electrical charge from the top of the thunderstorm (about 20 km [12.4 miles] above the ground) into the upper atmosphere (about 100 km [62.1 miles] above the ground). The upper part of gigantic jets produces red emissions identical to sprites [large-scale electric discharges above thunderclouds]. But while gigantic jets burst directly from the top of thunderstorms, sprites form independently, much higher in the atmosphere, appearing around 50 miles (80 km) above the Earth's surface.
"If ordinary lightning seems pretty ordinary, upper-atmosphere lightning is something else — an entire zoo of various upper-atmosphere electrical discharges," writes the Severe Weather Europe site.

And NASA made a request in a new blog post this week to any aspiring citizen scientists. "Have you captured an image of a jet, sprite, or other type of TLE? Submit your photos to Spritacular.org to help scientists study these fascinating night sky phenomena!"

Click here to see some of the photos from around the world that have already been uploaded and collected at Spritacular.org.

From the French newspaper Le Monde: Odorless, quiet, sustainable. On the last day of July, passengers boarded Barcelona's V3 bus line with no idea where its fuel came from. Written in large letters on the bus facade, just below its name "Nimbus," a sign clearly stated: "This bus runs on biomethane produced from eco-factory sludge." Still, the explanation was likely too vague for most to grasp its full meaning. The moist matter from wastewater treated at the Baix Llobregat treatment plant was used to produce the biomethane. In other words: the human waste of more than 1.5 million residents of the Catalan city.

"The planet Uranus emits more heat than it gets from the Sun," reports Science Daily , citing a new study led by University of Houston researchers, in collaboration with planetary scientists worldwide. "This means it's still slowly losing leftover heat from its early history," says the first author on the paper, "a key piece of the puzzle that helps us understand its origins and how it has changed over time."

The study found the planet emitting about 12.5% more heat than it absorbs via sunlight, which "suggests Uranus does have its own internal heat — an advance that not only informs NASA's future missions but also deepens scientists' understanding of planetary systems, including processes that influence Earth's climate and atmospheric evolution." The discovery resolves a long-standing scientific mystery about the giant planet, because observational analyses from Voyager 2 in 1986 didn't suggest the presence of significant internal heat — contradicting scientists' understanding of how giant planets form and evolve...

Additionally, the team's methodology provides testable theories and models that could also be applied to explore radiant energy of other planets within and beyond our solar system... It could even impact technology innovation and climate understanding on Earth [giving insights into "the fundamental processes that shape planetary atmospheres, weather systems and climate systems," said one of the paper's authors.]
The article adds that the researchers now think the planet "may have a different interior structure or evolutionary history compared to the other giant planets."

Scientists in Svalbard warn Arctic glaciers are in "terminal" decline, with microbe-driven biological darkening accelerating ice melt and potentially triggering major climate feedback loops. The Guardian reports: Recent research implicates snow and ice-dwelling microbes in positive feedback loops that can accelerate melting. With more than 70% of the planet's freshwater stored in ice and snow -- and billions of lives sustained by glacier-fed rivers -- this has profound implications everywhere. Yet not all polar microbes amplify global heating. Emerging evidence suggests that certain populations are -- for now -- applying a brake to methane emissions. [...] Microbes that live in surface ice and snow produce dark-colored pigments to harness sunlight and shield themselves from damaging UV light. They also trap dark-colored dust and debris. Together, these factors darken snow and ice, causing it to absorb more heat and melt faster -- a process known as "biological darkening."

Microbes also respond to global changes, such as increased nutrients from air pollution, wildfire smoke or wind-blown dust from receding glaciers and expanding drylands. "The snowpack chemistry is now different to preindustrial era snow," Edwards says. Rising temperatures and longer melt seasons caused by global heating further accelerate the growth of ice-darkening microbes. Together, these factors have the potential to trigger an amplifying positive feedback loop: ice-darkening microbes nudge up temperatures and accelerate melt, exposing more nutrient-rich debris that encourage the growth of yet more microbes, which darken the surface further still.

Each summer, a biologically darkened zone, visible from space, covering at least 100,000 sq km, appears on the south-western part of the Greenland ice sheet. According to a 2020 study, microbes there are responsible for 4.4 to 6.0-gigatons of runoff, representing up to 13% of total melt, from an ice mass that holds enough water to raise global sea levels by more than 7 meters. These effects are acknowledged in IPCC reports but not yet incorporated into climate projection models. Across the European Alps, Himalayas, central Asia and beyond, at least 2 billion people depend on glacial meltwater for drinking water, agriculture and hydropower. Yet even if the world meets Paris targets, half these glaciers will not survive this century.

Croatia has extended its digital nomad visa from one year to up to three years, allowing non-EU residents and their close family members to live and work remotely in the country. CNBC reports: A digital nomad visa is a short-term permit that allows individuals to stay in a country for an extended period and work remotely. The length of time a nomad can stay varies from place to place but most countries allow for six months to a year -- unless you have your eye on Croatia. Recently, the Balkan country announced it an update its digital nomad visa, which will allow non-EU residents to stay for up to three years. The visa also permits close family members of a digital nomad to join them.

Croatia's digital nomad visa website states that close family members also include partners or non-married couples who have been together for longer than three years without children, or for less time if they do have children together. Madrid Sartoretto believes that Croatia's expansion of its digital nomad program is a sign that the country is trying to attract more talent and compete with neighboring countries and their offerings.

"I think they are competing with other countries that are in the same region, like Estonia and Romania, that also attract a lot of digital nomads. If you give more benefits to people to come to your country, then you attract more talent. It's all about competition now," she adds. For those looking to apply for Croatia's digital nomad visa, Dr. Madrid Sartoretto says the country offers a low cost of living but still needs to improve its infrastructure, like more reliable internet speeds. "If you compare internet speed and reliability to countries like Romania, which has one of the fastest speeds in the world, Croatia needs to improve its infrastructure," she adds.

To apply for Croatia's digital nomad visa online, applicants must provide proof that they work outside of Croatia. Additionally, they must provide a copy of a valid travel document, proof of health insurance, proof of address in Croatia, and a minimum monthly income of 3,295 euros or $3,855 USD. For proof of income, applicants can submit a bank statement showing the total amount required, a bank statement demonstrating regular income, or pay slips for at least six months. Applicants must also send evidence that they have not been convicted of criminal offences in their home country or the country in which they have resided for more than a year immediately before arriving in Croatia.

alternative_right shares a report from ScienceAlert: In February 2023, a detector called KM3NeT, located deep under the Mediterranean Sea, picked up a signal that seemed to indicate a neutrino with a record-shattering energy of 220 petaelectronvolts (PeV). For reference, the previous record was a mere 10 PeV. Now, an exhaustive analysis of all the data on and around the event, designated KM3-230213A, not only supports the conclusions that the signal was caused by a 220-PeV neutrino, but adds to the mystery about where the heck in the Universe it came from."The patterns of light detected for KM3-230213A show a clear match to what is expected from a relativistic particle crossing the detector, most likely a muon, ruling out the possibility of a glitch," the KM3NeT Collaboration told ScienceAlert. "Thanks to the reconstructed energy and direction of this muon, the most likely scenario by far is that the muon originated in the interaction of an astrophysical neutrino in proximity to the detector, making it the most natural explanation."

The scientists believe that it's very, very unlikely that the neutrino originated within the Milky Way galaxy. Work is underway to come closer to tracing its origin point. "KM3-230213A opened a new window on ultra-high-energy neutrino astronomy," the Collaboration said. "Our analysis is the first effort to combine the observations of multiple telescopes over a wide energy range to characterize the ultra-high-energy spectrum. This represents our best chance to gain knowledge on the most extreme objects that populate our Universe."

The research has been published in the journal Physical Review X.

The African Union has endorsed the "Correct The Map" campaign, urging governments and global institutions to replace the distorted 16th-century Mercator projection with the Equal Earth map that more accurately represents Africa's true size. Reuters reports: "It might seem to be just a map, but in reality, it is not," AU Commission deputy chairperson Selma Malika Haddadi told Reuters, saying the Mercator fostered a false impression that Africa was "marginal," despite being the world's second-largest continent by area, with 54 nations and over a billion people. Such stereotypes influence media, education and policy, she said. Criticism of the Mercator map is not new, but the 'Correct The Map' campaign led by advocacy groups Africa No Filter and Speak Up Africa has revived the debate, urging organizations to adopt the 2018 Equal Earth projection, which tries to reflect countries' true sizes.

"The current size of the map of Africa is wrong," Moky Makura, executive director of Africa No Filter, said. "It's the world's longest misinformation and disinformation campaign, and it just simply has to stop." Fara Ndiaye, co-founder of Speak Up Africa, said the Mercator affected Africans' identity and pride, especially children who might encounter it early in school. "We're actively working on promoting a curriculum where the Equal Earth projection will be the main standard across all (African) classrooms," Ndiaye said, adding she hoped it would also be the one used by global institutions, including Africa-based ones. [...]

The Mercator projection is still widely used, including by schools and tech companies. Google Maps switched from Mercator on desktop to a 3D globe view in 2018, though users can still switch back to the Mercator if they prefer. On the mobile app, however, the Mercator projection remains the default. 'Correct The Map' wants organizations like the World Bank and the United Nations to adopt the Equal Earth map. A World Bank spokesperson said they already use the Winkel-Tripel or Equal Earth for static maps and are phasing out Mercator on web maps.

Negotiations on a global treaty to end plastic pollution are drawing to a close Thursday, as nations remain deadlocked over whether to tackle the exponential growth of plastic production. From a report: A draft of the treaty released Wednesday wouldn't limit plastic production or address chemicals used in plastic products. Instead, it's centered on proposals where there's broad agreement -- such as reducing the number of problematic plastic products that often enter the environment and are difficult to recycle, promoting the redesign of plastic products so they can be recycled and reused, and improving waste management.

It asks nations to make commitments to ending plastic pollution, rather than imposing global, legally-binding rules. French President Emmanuel Macron said the "lack of ambition" in the draft treaty was unacceptable, and that agreeing to a global treaty against plastic pollution "is our opportunity to make a difference."

Extreme heat is breaking temperature records across Europe, early measurements suggest, and driving bigger and stronger wildfires. From a report: In south-west France, records were broken on Monday in Angouleme, Bergerac, Bordeaux, Saint-Emilion and Saint-Girons. Meteo France said the "often remarkable, even unprecedented, maximum temperatures" in the region were 12C above the norm for the last few decades.

In Croatia, air temperature records were set in Sibenik, at 39.5C, and Dubrovnik, at 38.9C, while large forest fires raged along its coasts and ripped through neighbouring countries in the Balkans. The day before, Hungary broke its daily maximum temperature record when a weather station in Korosladany hit 39.9C. The capital, Budapest, also broke its daily maximum record as it sweltered through 38.7C heat.

Beyond Europe, dozens of temperature records were broken across Canada, and record-breaking heat above 50C in Iraq was blamed for a nationwide blackout. The heatwave in southern Europe comes as Nordic countries recover from unprecedentedtemperatures above 30C in the Arctic Circle this month.

An anonymous reader shares a report: Can deleting old emails and photos help the UK tackle ongoing drought this year? That's the hope, according to recommendations for the public included in a press release today from the National Drought Group.

There are far bigger steps companies and policymakers can take to conserve water of course, but drought has gotten bad enough for officials to urge the average person to consider how their habits might help or hurt the situation. And the proliferation of data centers is raising concerns about how much water it takes to power servers and keep them cool.

"Simple, everyday choices -- such as turning off a tap or deleting old emails -- also really helps the collective effort to reduce demand and help preserve the health of our rivers and wildlife," Helen Wakeham, Environment Agency Director of Water, said in the press release.

After four weather-related delays, Amazon successfully launched 24 more Kuiper internet satellites aboard a SpaceX Falcon 9, bringing its total to 102. CNBC reports: SpaceX's Starlink is currently the dominant provider of low-earth orbit satellite internet, with a constellation of roughly 8,000 satellites and about 5 million customers worldwide. Amazon is racing to get more of its Kuiper satellites into space to meet a deadline set by the Federal Communications Commission. The FCC requires that Amazon have about 1,600 satellites in orbit by the end of July 2026, with the full 3,236-satellite constellation launched by July 2029.

Amazon has booked up to 83 launches, including three rides with SpaceX. While the company is still in the early stages of building out its constellation, Amazon has already inked deals with governments as it hopes to begin commercial service later this year.

Biochar produced from solid human excrement could supply up to 7% of global phosphorus fertilizer needs annually, according to a Cornell University study published in PNAS. When combined with nutrients extracted from urine, the process could provide 15% of phosphorus, 17% of nitrogen, and 25% of potassium used in agriculture worldwide.

The biochar production process reduces solid waste volume and weight by up to 90%, while allowing nutrient proportions to be adjusted for specific crop requirements.

Imagine this. Lightning sparks a wildfire, but "within seconds, a satellite dish swirling overhead picks up on the anomaly and triggers an alarm," writes the Los Angeles Times. "An autonomous helicopter takes flight and zooms toward the fire, using sensors to locate the blaze and AI to generate a plan of attack. It measures the wind speed and fire movement, communicating constantly with the unmanned helicopter behind it, and the one behind that. Once over the site, it drops a load of water and soon the flames are smoldering. Without deploying a single human, the fire never grows larger than 10 square feet.

"This is the future of firefighting." On a recent morning in San Bernardino, state and local fire experts gathered for a demonstration of the early iterations of this new reality. An autonomous Sikorski Black Hawk helicopter, powered by technology from Lockheed Martin and a California-based software company called Rain, is on display on the tarmac of a logistics airport in Victorville — the word "EXPERIMENTAL" painted on its military green-black door. It's one of many new tools on the front lines of firefighting technology, which experts say is evolving rapidly as private industry and government agencies come face-to-face with a worsening global climate crisis...

Scientific studies and climate research models have found that the number of extreme fires could increase by as much as 30% globally by 2050. By 2100, California alone could see a 50% increase in wildfire frequency and a 77% increase in average annual acres burned, according to the state's most recent climate report. That's largely because human-caused climate change is driving up temperatures and drying out the landscape, priming it to burn, according to Kate Dargan Marquis, a senior advisor with the Gordon and Betty Moore Foundation who served as California's state fire marshal from 2007 to 2010.... "[T]he policies of today and the technologies of today are not going to serve us tomorrow."

Today, more than 1,100 mountaintop cameras positioned across California are already using artificial intelligence to scan the landscape for the first sign of flames and prompt crews to spring into action. NASA's Earth-observing satellites are studying landscape conditions to help better predict fires before they ignite, while a new global satellite constellation recently launched by Google is helping to detect fires faster than ever before.
One 35-year fire service veteran who consults on fire service technologies even predicts fire-fighting robots will also be used in high-risk situations like the Colossus robot that battled flames searing through Notre-Dame Cathedral in Paris...

And a bill moving through California's legislation "would direct the California Department of Forestry and Fire Protection to establish a pilot program to assess the viability of incorporating autonomous firefighting helicopters in the state."