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"Engineers from Ohio State University are developing a new way to power rocket engines," reports Gizmodo, "using liquid uranium for a faster, more efficient form of nuclear propulsion that could deliver round trips to Mars within a single year..." Nuclear propulsion uses a nuclear reactor to heat a liquid propellant to extremely high temperatures, turning it into a gas that's expelled through a nozzle and used to generate thrust. The newly developed engine concept, called the centrifugal nuclear thermal rocket (CNTR), uses liquid uranium to heat rocket propellant directly. In doing so, the engine promises more efficiency than traditional chemical rockets, as well as other nuclear propulsion engines, according to new research published in Acta Astronautica... Traditional chemical engines produce about 450 seconds of thrust from a given amount of propellant, a measure known as specific impulse. Nuclear propulsion engines can reach around 900 seconds, with the CNTR possibly pushing that number even higher. "You could have a safe one-way trip to Mars in six months, for example, as opposed to doing the same mission in a year," Spencer Christian, a PhD student at Ohio State and leader of CNTR's prototype construction, said in a statement. CNTR promises faster routes, but it could also use different types of propellant, like ammonia, methane, hydrazine, or propane, that can be found in asteroids or other objects in space. "Some potential hurdles include ensuring that the methods used for startup, operation and shutdown avoid instabilities," according to the researchers' announcement, as well as "envisioning ways to minimize the loss of uranium fuel and accommodate potential engine failures." But "This team's CNTR concept is expected to reach design readiness within the next five years..." Read more of this story at Slashdot.

RestOfWorld.org reports on "a global crisis nobody anticipated when governments started subsidizing electric vehicles..." "EVs can lose almost half their driving distance when temperatures drop, and the billions spent on improving technology have failed to fix this fundamental limitation." In January, Seattle-based Recurrent, a company that tests and analyzes EVs, found an average range loss of 20% in extreme cold... Lithium-ion batteries rely on chemical reactions that slow dramatically in cold weather. When temperatures plunge, the electrolyte thickens, ions move sluggishly, and charging becomes not just inefficient but potentially dangerous. Charging in cold weather has been identified as a primary cause of thermal acceleration, which can lead to fires... The failure pattern repeats globally wherever cold weather meets inadequate infrastructure. Manufacturers, too, have acknowledged the problem. Chinese EV maker BYD's user manual, for instance, advises drivers to charge indoors, with the heating on. That advice is useless for farmers parking in open courtyards. In fact, research across 293 Chinese cities "found that many drivers in colder regions buy EVs only as supplementary vehicles," according to the article, "while still relying on gasoline-powered cars during winter." The article also tells the story of an apple grower chilly Kashmir, India who discovered that his Chinese three-wheeler lost 60% of its 10-hour charge overnight. This made it impossible to begin the 56-kilometer (35-mile) trip on a route with no charging stations — and prevented him from selling his produce while it was fresh (to earn the highest prices). And the problem affects the entire region: Desperate drivers have formed WhatsApp groups, such as "EV Apple Transporters" and "Battery Help Kashmir," sharing increasingly absurd workarounds. Some have wrapped batteries in quilts; others have hauled power packs weighing 90 kilograms (over 200 pounds) into their homes for the night. One driver parked his battery in the living room. "The blankets caused overheating on the road; water bottles leaked into the circuits," [orchard owner] Sajad Ahmad said. "We became mechanics, engineers, and fools all at once." EVs are also not considered cost-efficient. "Diesel vans are expensive, but they can do four or five trips a day," Mohammad Yaseen, a driver based in Shopian, told Rest of World. "With EVs, one half-trip and you're stuck." Norway, where winter temperatures average minus 7 degrees Celsius (19 degrees Fahrenheit), achieved 89% EV market share with its comprehensive infrastructure. It offers more than 200 models for year-round usage. "The ability to preheat batteries upon fast charging in winter is by far the most important improvement we have seen in the past five years," Christina Bu, secretary-general of the Norwegian EV Association, told Rest of World. "These features are standard in Norway's mature market, but remain absent from basic models exported to developing countries." Read more of this story at Slashdot.

"There has never been a successful, widespread malware attack against iPhone," notes Apple's security blog, pointing out that "The only system-level iOS attacks we observe in the wild come from mercenary spyware... historically associated with state actors and [using] exploit chains that cost millions of dollars..." But they're doing something about it — this week announcing a new always-on memory-safety protection in the iPhone 17 lineup and iPhone Air (including the kernel and over 70 userland processes)... Known mercenary spyware chains used against iOS share a common denominator with those targeting Windows and Android: they exploit memory safety vulnerabilities, which are interchangeable, powerful, and exist throughout the industry... For Apple, improving memory safety is a broad effort that includes developing with safe languages and deploying mitigations at scale... Our analysis found that, when employed as a real-time defensive measure, the original Arm Memory Tagging Extension (MTE) release exhibited weaknesses that were unacceptable to us, and we worked with Arm to address these shortcomings in the new Enhanced Memory Tagging Extension (EMTE) specification, released in 2022. More importantly, our analysis showed that while EMTE had great potential as specified, a rigorous implementation with deep hardware and operating system support could be a breakthrough that produces an extraordinary new security mechanism.... Ultimately, we determined that to deliver truly best-in-class memory safety, we would carry out a massive engineering effort spanning all of Apple — including updates to Apple silicon, our operating systems, and our software frameworks. This effort, together with our highly successful secure memory allocator work, would transform MTE from a helpful debugging tool into a groundbreaking new security feature. Today we're introducing the culmination of this effort: Memory Integrity Enforcement (MIE), our comprehensive memory safety defense for Apple platforms. Memory Integrity Enforcement is built on the robust foundation provided by our secure memory allocators, coupled with Enhanced Memory Tagging Extension (EMTE) in synchronous mode, and supported by extensive Tag Confidentiality Enforcement policies. MIE is built right into Apple hardware and software in all models of iPhone 17 and iPhone Air and offers unparalleled, always-on memory safety protection for our key attack surfaces including the kernel, while maintaining the power and performance that users expect. In addition, we're making EMTE available to all Apple developers in Xcode as part of the new Enhanced Security feature that we released earlier this year during WWDC... Based on our evaluations pitting Memory Integrity Enforcement against exceptionally sophisticated mercenary spyware attacks from the last three years, we believe MIE will make exploit chains significantly more expensive and difficult to develop and maintain, disrupt many of the most effective exploitation techniques from the last 25 years, and completely redefine the landscape of memory safety for Apple products. Because of how dramatically it reduces an attacker's ability to exploit memory corruption vulnerabilities on our devices, we believe Memory Integrity Enforcement represents the most significant upgrade to memory safety in the history of consumer operating systems. Read more of this story at Slashdot.

"When residents of Equatorial Guinea's Annobón island wrote to the government in Malabo in July last year complaining about the dynamite explosions by a Moroccan construction company, they didn't expect the swift end to their internet access..." reports the Associated Press. "Residents and activists said the company's dynamite explosions in open quarries and construction activities have been polluting their farmlands and water supply..." Dozens of the signatories and residents were imprisoned for nearly a year, while internet access to the small island has been cut off since then, according to several residents and rights groups. Local residents interviewed by The Associated Press left the island in the past months, citing fear for their lives and the difficulty of life without internet. Banking services have shut down, hospital services for emergencies have been brought to a halt and residents say they rack up phone bills they can't afford because cellphone calls are the only way to communicate... The company's work on the island continues. Residents hoped to pressure authorities to improve the situation with their complaint in July last year. Instead, [the country's president] then deployed a repressive tactic now common in Africa to cut off access to internet to clamp down on protests and criticisms. Read more of this story at Slashdot.

Many coral reefs "have now turned ghostly white," reports CBS News — and "a major culprit is climate change." SFGate adds that more than 50% of the world's coral reefs have been lost, mostly over the past 10 years, according to coral reef scientist Rebecca Albright at the California Academy of Sciences. "If changes aren't made soon, 90% to 99% of the coral reefs that are remaining could be deteriorated by 2050, Albright said..." But CBS News notes that Albright's lab is the first in America to successfully spawn coral to regenerate the reefs: The lab is mastering the art and science of creating baby corals, and the scientists have brought their expertise into the wild. The location: the second-largest reef in the world, known as the Mesoamerican Reef, stretching some 700 miles along the coasts of Mexico, Belize, Guatemala, and Honduras... Armed with test tubes, the scientists quickly dove into the water and collected the tiny packets of gametes. Back on land, the eggs were fertilized, incubated, and then brought back into the wild. "Then we planted over 3,000 baby corals back to the reef," explained Albright. The baby corals are now two months old. The Roatan staff will dive in a few months to see how many survived. Scientists are worried because bleaching events "are becoming more common," notes SFGate, "happening more frequently and affecting more parts of the world... The most current event was confirmed on April 15, 2024, and is still ongoing, impacting approximately 84% of the world's coral reefs as of August 31. "It has been documented in at least 83 countries and territories." Read more of this story at Slashdot.

One of the worlds in the TRAPPIST-1 system, a mere 40 light-years away, just might be clad in a life-supporting atmosphere," reports ScienceAlert. "In exciting new JWST observations, the Earth-sized exoplanet TRAPPIST-1e shows hints of a gaseous envelope similar to our own, one that could facilitate liquid water on the surface." Although the detection is ambiguous and needs extensive follow-up to find out what the deal is, it's the closest astronomers have come yet in their quest to find a second Earth... [T]he first step is finding exoplanets that are the right distance from their host star, occupying a zone where water neither freezes under extreme cold nor evaporates under extreme heat. Announced in 2016, the discovery of the TRAPPIST-1 system was immediately exciting for this reason. The red dwarf star hosts seven exoplanets that have a rocky composition (as opposed to gas or ice giants), several of which are bang in the star's habitable, liquid water zone... Red dwarf stars are also much more active than Sun-like stars, rampant with flare activity that, scientists have speculated, may have stripped any planetary atmospheres in the vicinity. Closer inspections of TRAPPIST-1d, one of the other worlds in the star's habitable zone, have turned up no trace of an atmosphere. But TRAPPIST-1e is a little more comfortably located, at a slightly greater distance from the star... [T]he spectrum is consistent with an atmosphere rich in molecular nitrogen, with trace amounts of carbon dioxide and methane. This is pretty tantalizing. Earth's atmosphere is roughly 78 percent molecular nitrogen. If the results can be validated, TRAPPIST-1e might just be the most Earth-like exoplanet discovered to date. That is not a small if, though. Luckily, more JWST observations are in the pipeline, and the researchers should be able to validate or rule out an atmosphere very soon. After analyzing four transits of TRAPPIST-1e across TRAPPIST-1, "We are seeing two possible explanations," says astrophysicist Ryan MacDonald of the University of St Andrews in the UK. "The most exciting possibility is that TRAPPIST-1e could have a so-called secondary atmosphere containing heavy gases like nitrogen. "But our initial observations cannot yet rule out a bare rock with no atmosphere..." Astrophysicist Ana Glidden of MIT led the second team interpreting the results, and says "We are really still in the early stages of learning what kind of amazing science we can do with Webb. It's incredible to measure the details of starlight around Earth-sized planets 40 light-years away and learn what it might be like there, if life could be possible there." "We're in a new age of exploration that's very exciting to be a part of." Read more of this story at Slashdot.

They stole a woman's phone in Barcelona. Unfortunately, her husband was security consultant/penetration tester Martin Vigo, reports Spain's newspaper El Pais. "His weeks-long investigation coincided with a massive two-year police operation between 2022 and 2024 in six countries where 17 people were arrested: Spain, Argentina, Colombia, Chile, Ecuador, and Peru...." In Vigo's case, the phone was locked and the "Find my iPhone" feature was activated... Once stolen, the phones are likely wrapped in aluminum foil to prevent the GPS from tracking their movements. "Then they go to a safe house where they are gathered together and shipped on pallets outside of Spain, to Morocco or China." This international step is vital to prevent the phone from being blocked if the thieves try to use it again. Carriers in several European countries share lists of the IMEIs (unique numbers for each device) of stolen devices so they can't be used. But Morocco, for example, doesn't share these lists. There, the phone can be reconnected... With hundreds or thousands of stored phones, another path begins: "They try to get the PIN," says Vigo. Why the PIN? Because with the PIN, you can change the Apple password and access the device's content. The gang had created a system to send thousands of text messages like the one Vigo received. To know who to target with the bait message, the police say, "the organization performed social profiling of the victims, since, in many cases, in addition to the phone, they also had the victim's personal belongings, such as their ID." This is how they obtained the phone numbers to send the malicious SMS... Each victim received a unique link, and the server knew which victim clicked it... With the first click, the attackers would redirect the user to a website they believed was credible, such as Apple's real iCloud site... [T]he next day you receive another text message, and you click on it, more confidently. However, that link no longer redirects you to the real Apple website, but to a flawless copy created by the criminals: that's where they ask for your PIN, and without thinking, full of hope, you enter it... "The PIN is more powerful than your fingerprint or face. With it, you can delete the victim's biometric information and add your own to access banking apps that are validated this way," says Vigo. Apple Wallet asks you to re-authenticate, and then everything is accessible... In the press release on the case, the police explained that the gang allegedly used a total of 5,300 fake websites and illegally unlocked around 1.3 million high-end devices, about 30,000 of them in Spain. Vigo tells El Pais that if the PIN doesn't unlock the device, the criminal gang then sends it to China to be "dismantled and then sent back to Europe for resale. The devices are increasingly valuable because they have more advanced chips, better cameras, and more expensive materials." To render the phone untraceable in China, "they change certain components and the IMEI. It requires a certain level of sophistication: opening the phone, changing the chip..." Read more of this story at Slashdot.

After its six-year journey to Saturn's moon Titan, Dragonfly's rotorcraft lander "will fly like a large drone," explains its web page, spending three years sampling multiple landing sites to characterize Titan's habitability and look for "precursors of the origin of life." "However, the project has undergone multiple replans impacting cost and schedule, resulting in a life-cycle cost increase of nearly $1 billion and over 2 years of delays," according to an announcement from NASA's Inspector General. From the Inspector General's report: The cost increase and schedule delay were largely the result of NASA directing [Johns Hopkins University] Applied Physics Laboratory to conduct four replans between June 2019 and July 2023 early in Dragonfly's development. Justifications for these replans included the COVID-19 pandemic, supply chain issues, changes to accommodate a heavy-lift launch vehicle, projected funding challenges, and inflation." But its higher-than-expected life-cycle cost over $3 billion "will continue to absorb an increasing proportion of the Planetary Science Division's total budget," meaning Dragonfly's increased cost (and "additional budget constraints") have "contributed to a gap of at least 12 years in New Frontiers [planetary science] mission launches, and will jeopardize future priorities outlined in the National Academies of Sciences, Engineering, and Medicine's (National Academies) decadal surveys." Yet a NASA press release notes the mission "has cleared several key design, development and testing milestones and remains on track toward launch in July 2028." Its software-defined radio has been completed, and the part of the spectrometer which analyzes Titan's chemical components for "potentially biologically relevant" compounds (as well as structural and thermal testing of the lander's insulation). "The mission is scheduled to launch in July 2028 on a SpaceX Falcon Heavy launch vehicle from NASA's Kennedy Space Center in Florida." Thanks to long-time Slashdot reader schwit1 for spotting this news on the space/science blog "Behind the Black". Read more of this story at Slashdot.