Vue lecture

Il y a de nouveaux articles disponibles, cliquez pour rafraîchir la page.

A California Boy Was Kidnapped from a Park in 1951. He's Just Been Found Alive

An anonymous reader shared this story from SFGate: A boy who was kidnapped from an Oakland playground in 1951 has been found alive on the East Coast, a remarkable resolution to a mystery that has haunted his family for over half a century. On February 21, 1951, 6-year-old Luis Armando Albino was playing with his older brother Roger at Jefferson Square Park. The boys had recently immigrated with their mother and four other siblings from Puerto Rico... That afternoon, Luis and 10-year-old Roger walked down the block from their home at 730 Brush Street to play in the park. They were approached by a woman in her 30s, wearing a green bandana over her hair, who began chatting with Luis in Spanish. She promised she would buy him candy if he came along with her, and little Luis agreed to join her. Wary, Roger trailed the pair for a while before returning home to alert an adult to the strange encounter. Oakland police were called by frantic family members and a search was immediately launched... Antonia [the boy's mother] was convinced her son was alive. "She came once a week, then once a month, then at least once a year, to see the shake of the head, to have the answer 'no' translated for her although she could read it in the officers' faces," the Oakland Tribune wrote in 1966... Decades passed. In 2020, Luis' niece, Alida Alequin, took a DNA test on a whim, the Mercury News reported. The service returned several possible family members to the Oakland woman. One of them was a man who Alequin had never met. After some internet sleuthing, she began to suspect this man might be the missing uncle she'd heard so much about. She reached out to the man but didn't hear back. Earlier this year, Alequin tried again. Armed with photos, she took her evidence to the Oakland Police Department's missing persons unit. In short order, the FBI and California Department of Justice were also investigating Alequin's lead. They discovered the man was living on the East Coast, had worked as a firefighter and served two tours in Vietnam with the Marine Corps. This week, the Mercury News first reported that a DNA test confirmed what Alequin suspected: This was Luis Albino. In June, Luis flew to California to reunite with his family, among them his devoted brother Roger... For over 70 years, he lived on the East Coast believing he was the son of another couple.... When Luis met Alequin for the first time this summer, he held her in an embrace. "Thank you," he said, "for finding me."

Read more of this story at Slashdot.

Telegram CEO Durov Fathered Over 100 Kids as an Anonymous Sperm Donor

An anonymous reader shared this report from USA Today: He's the founder of Telegram. He was arrested in France. He also claims to have fathered at least 100 children... The 39-year-old Russian-born billionaire often keeps his personal life out of the spotlight. Something he has shared, however, is that, despite never marrying and preferring to live alone, he's fathered at least 100 children through anonymous sperm donation... Durov noted he plans to "open-source" his DNA so his biological children can find each other more easily. "I also want to help destigmatize the whole notion of sperm donation and incentivize more healthy men to do it, so that families struggling to have kids can enjoy more options," he wrote. "Defy convention — redefine the norm...!" "Sperm donation has allowed many people to have families who otherwise wouldn't be able to," the article points out. But it also adds that the anonymous practice "has drawn several detractors, including from those who've been conceived through it." These people have shared with USA TODAY the mental turmoil of learning they have, in some cases, hundreds of half-siblings... One of the main criticisms of the practice is that the anonymity of the donor makes it difficult or impossible for donor-conceived people to learn about their health and treat genetically inherited medical issues. Even when donor-conceived people have their donor's identity and contact information, there's still no guarantee they'll respond or tell the truth. Also, most sperm banks in the United States aren't legally required to keep records of siblings or cap the number of families that can use a specific donor. As a result, donor-conceived people with many siblings often live in fear of accidentally having children with one of their half-siblings, or even having children with their own father if they were to pursue donor insemination.

Read more of this story at Slashdot.

A Simple Blood Test Predicts a Person's Heart Disease Risk 30 Years Out, Study Finds

An anonymous Slashdot reader shared this report from NBC News: A new approach to a routine blood test could predict a person's 30-year risk of heart disease, research published Saturday in the New England Journal of Medicine found. Doctors have long assessed their patients' risk for cardiovascular disease by using a blood test to look at cholesterol levels, focusing particularly on LDL or "bad" cholesterol. But limiting blood testing to just cholesterol misses important — and usually silent — risk factors, experts say... Lead study author Dr. Paul Ridker, director of the Center for Cardiovascular Disease Prevention at Brigham and Women's Hospital in Boston and his team found that in addition to LDL cholesterol, two other markers — a type of fat in the blood called lipoprotein (a), or Lp(a), and an indicator of inflammation — are important predictors of a person's risk of heart attack, stroke and coronary heart disease... In the study, the researchers analyzed data from nearly 30,000 U.S. women who were part of the Women's Health Study. On average, the women were 55 years old when they enrolled in the years 1992 through 1995. About 13% — roughly 3,600 participants — had either a heart attack or stroke, had surgery to fix a narrowed or blocked artery, or died from heart disease over the 30-year follow-up period... All of the women had blood tests done at the beginning of the study to measure their LDL cholesterol, Lp(a) and C-reactive protein levels, a marker of inflammation in the body. These measurements, individually as well as together, appeared to predict a woman's heart health over the next three decades, the study found. Women with the highest levels of LDL cholesterol had a 36% higher risk for heart disease compared with those with the lowest levels. The highest levels of Lp(a) indicated a 33% elevated risk, and those with the highest levels of CRP were 70% more at risk for heart disease. When the three were looked at together, women who had the highest levels were 1.5 times more likely to have a stroke and over three times more likely to develop coronary heart disease over the next 30 years compared with women with the lowest levels. All of the markers have been individually linked to higher risk of heart disease, but "all three represent different biological processes. They tell us why someone is actually at risk," Ridker said.

Read more of this story at Slashdot.

Can We Fight Climate Change By Bioengineering a Better Cow?

One of Slashdot's most-visited stories of all time was the 2016 story asking: Can Cow Backpacks Reduce Global Methane Emissions? "Enteric fermentation," or livestock's digestive process, accounts for 22 percent of all U.S. methane emissions, and the manure they produce makes up eight percent more, according to the U.S. Environmental Protection Agency... Methane, like carbon, is a greenhouse gas, but methane's global warming impact per molecule is 25 times greater than carbon's, according to the EPA. Cow methane still "heats the Earth more than every flight across the world combined," the Washington Post added today, reporting on a new $30 million genetic engineering experiment undertaken by the Innovative Genomics Institute and the University of California at Davis. Its mission: to transform a cow's gut so it no longer releases methane. Using tools that snip and transfer DNA, researchers plan to genetically engineer microbes in the cow stomach to eliminate those emissions. If they succeed, they could wipe out the world's largest human-made source of methane and help change the trajectory of planetary warming... The average cow produces around 220 pounds of methane per year, or around half the emissions of an average car; cows are currently responsible for around 4 percent of global warming, according to the Food and Agriculture Organization... Scientists envision a kind of probiotic pill, given to the cow at birth, that can transform its microbiome permanently... The current project doesn't target only a particular cow species — it takes aim at the microbiome itself, offering a solution that could apply to all of them. Brad Ringeisen, executive director at the genomics institute, cut his teeth running biotechnology at the U.S. defense research agency DARPA, which helped pioneer transformative innovations including the internet, miniaturized GPS, stealth aircraft and the computer mouse. "I'm taking the DARPA mentality here," he said. "Let's solve it for all cows, not just a fraction of the cows." ...] "There's no reason a cow has to produce methane," Ringeisen said. So what if scientists could just ... turn it off? "I personally think this is the one that can make the biggest impact in the world," Ringeisen said. "Say you could wave a magic wand and eliminate all those emissions." The article says that currently the scientists are feeding red-seaweed oil to a cow to measure the changes, to prepare for their final goal: "replicate those changes with gene editing." (They're using machine learning to reassemble the hundreds of pieces of each miccroorganism's DNA, so they can understand which changes they need to make with their early-intervention probiotic.) Such a probiotic could also improve a farm's productivity. Cows can lose up to 12 percent of their energy through burping up methane; other ruminants, like sheep and goats, also lose energy in this way. "If there is a way to redirect that hydrogen and convert it into milk, meat, wool — it would be much more accepted by farmers," said Ermias Kebreab [a professor of animal science at UC-Davis]. Early treatments will be tested on the cows at Davis, with researchers tracking their burps to evaluate the drop-off in methane emissions. There is still a long way to go. While scientists have proved that they can gene-edit microbes, researchers have so far only shown that they can edit a small fraction of the microbes in the cow gut — or the human gut, for that matter. Institute researchers are developing microbial gene-editing tools, even as they are mapping the species of the microbiome. They are building the plane while flying it. The teams have received enough funding for seven years of research. The project started last year, and they hope to have a trial treatment ready for testing in cows in the next two years.

Read more of this story at Slashdot.

Second Human To Receive Neuralink Brain Chip Uses It To Play Counter-Strike 2

In a blog post on Wednesday, Neuralink said its second human recipient is using the brain chip to play Counter-Strike 2 and develop 3D designs in CAD software. "Alex" was given the brain chip last month to help restore his autonomy after a spinal cord injury. PCMag reports: Like the first Neuralink patient, Noland Arbaugh, Alex has also been using the brain chip to play his favorite computer games, such as Counter-Strike 2. Before, Alex had to use a mouth-operated controller, called a QuadStick, to play the first-person shooter. But even then, the controller limited him to only moving or aiming his weapon at a single time, never simultaneously like a normal Counter-Strike player. In other words, Alex had to essentially switch back and forth between the mouse and keyboard functions while playing the game. But thanks to Neuralink, he can now aim with the implant, and simultaneously move while using the QuadStick. [...] In the blog post, Neuralink also addressed a problem the company faced when placing the chip in Arbaugh, the first patient. Despite a successful surgery, about 85% of the thread-based electrodes attached to his brain later became displaced, undermining the full potential of the chip to read neural signals. Although Arbaugh can still use his implant effectively, Neuralink wanted to avoid a repeat with Alex. In response, the company developed several "mitigations," which include reducing the chance of an air pocket forming during surgery and placing the implant deeper into the brain tissue. "Promisingly, we have observed no thread retraction in our second participant," the company said of Alex. Whether Alex's implant outperforms the brain chip in Arbaugh was left unclear. In the meantime, Neuralink says it's working on ways to enhance the controls on the technology "to deliver full mouse and video game controller functionality." "Additionally, we plan to enable the Link [brain chip] to interact with the physical world, allowing users to feed themselves and move more independently by controlling a robotic arm or their wheelchair," the company said. You can watch Alex playing Counter-Strike 2 on YouTube.

Read more of this story at Slashdot.

Can Food Scientists Re-Invent Sugar?

The Wall Street Journal visits scientists at Harvard University's Wyss Institute for Biologically Inspired Engineering who are researching a "sugar-to-fiber" enzyme (normally used by plants to create stalks). They're testing a version they've "encased in spherical nanoparticles — tiny mesh-like cages made of pectin that allow the enzyme to be added to food without being activated until it reaches the intestine. "Once there, a change in pH causes the cage to expand, freeing the enzyme to float through its holes and start converting sugar to fiber." The Wyss Institute's goal for its enzyme product was to reduce the sugar absorbed from food by 30%, though it has the potential to remove even more than that, says Sam Inverso, director of business development partnerships at the Wyss Institute. The enzyme's ability to turn sugar into fiber is also key, as most Americans don't get nearly enough fiber in their diet, says Adama Sesay, a senior engineer at the Wyss Institute who worked on the project... The Wyss Institute is now licensing the technology to a company to help bring its enzyme product to market, a process that entails additional testing and work to secure regulatory approval. Inverso says that the aim is for the product to be available to U.S. food manufacturers within the next two years, and that other encapsulated enzymes could follow: products that reduce lactose absorption after drinking milk, or cut gluten after eating bread. For now the enzyme works better in solid food than in a liquid. Producing it in large quantities and at low cost is still a ways off — currently it's 100 times more expensive than raw sugar, Inverso says. And the Journal notes they're not the only ones working on the problem: San Francisco-based startup Biolumen recently launched a product called Monch Monch, a drink mix made of fibrous, microscopic sponges designed to soak up sugar and prevent it from reaching the bloodstream. At mealtime consumers can blend a teaspoon of Monch Monch, which has no taste, smell or color, into drinks from water to wine. Once it has reached the stomach, the sponges start to swell and sequester sugar, reducing its burden on the body, says Dr. Robert Lustig, Biolumen's co-founder and chief medical officer... One gram of Monch Monch can sequester six grams of sugar, says Lustig... The product, introduced as a dietary supplement, can also be used as a food ingredient under a Food and Drug Administration principle known as "generally recognized as safe." Packets of Monch Monch are available for purchase online, and Biolumen says it is in talks with U.S. food manufacturers it declined to name about its use in other products... Food companies are betting on other solutions for now. Cereal startup Magic Spoon uses allulose, a natural sugar found in figs and raisins that is growing in popularity, helped by FDA guidance that allows it to be excluded from sugar or added-sugar totals on nutrition labels. Ingredient company Tate & Lyle, which makes allulose from corn kernels, says the sweetener tastes like sugar and adds bulk and caramel color, but passes through the body without being metabolized... Chicago-based Blommer Chocolate recently launched a line of reduced-sugar chocolate and confectionery products made with Incredo, a sugar that has been physically altered to taste sweeter using a mineral carrier that dissolves faster in saliva and targets the sweet-taste receptors on the tongue. Incredo's use enables manufacturers to use up to 50% less sugar, the company says. The article even notes that "researchers still working to reduce sugar are peddling new technologies, like individual sugar crystals modified to dissolve more quickly in the mouth, making food taste sweeter."

Read more of this story at Slashdot.

Neuralink Has Successfully Implanted a Second Brain Chip, Musk Says

Late Friday Elon Musk appeared on Lex Fridman's podcast for a special eight-hour episode about Neuralink. It's already been viewed 1,702,036 times on YouTube — and resulted in this report from Reuters: Neuralink has successfully implanted in a second patient its device designed to give paralyzed patients the ability to use digital devices by thinking alone, according to the startup's owner Elon Musk... [Musk] gave few details about the second participant beyond saying the person had a spinal cord injury similar to the first patient, who was paralyzed in a diving accident. Musk said 400 of the implant's electrodes on the second patient's brain are working. Neuralink on its website states that its implant uses 1,024 electrodes... Musk said he expects Neuralink to provide the implants to eight more patients this year as part of its clinical trials. Neuralink's device "has allowed the first patient to play video games, browse the internet, post on social media and move a cursor on his laptop," according to the article: The first patient, Noland Arbaugh, was also interviewed on the podcast, along with three Neuralink executives, who gave details about how the implant and the robot-led surgery work. Before Arbaugh received his implant in January, he used a computer by employing a stick in his mouth to tap the screen of a tablet device. Arbaugh said with the implant he now can merely think about what he wants to happen on the computer screen, and the device makes it happen... Arbaugh has improved on his previous world record for the speed at which he can control a cursor with thoughts alone "with only roughly 10, 15% of the electrodes working," Musk said on the podcast. Fridman said his interview with Musk was "the longest podcast I've ever done," calling their conversation "fascinating, super technical, and wide-ranging... I loved every minute of it."

Read more of this story at Slashdot.

Revolutionary Dual Action Antibiotic Makes Bacterial Resistance Nearly Impossible

A new type of antibiotic "targets bacteria in two ways," writes SciTechDaily, which "could make it 100 million times harder for bacteria to develop resistance, according to recent research from the University of Illinois Chicago." Their experiments demonstrate that [a class of synthetic drugs called] macrolones can work two different ways — either by interfering with protein production or corrupting DNA structure. Because bacteria would need to implement defenses to both attacks simultaneously, the researchers calculated that drug resistance is nearly impossible. "The beauty of this antibiotic is that it kills through two different targets in bacteria," said Alexander Mankin, distinguished professor of pharmaceutical sciences at UIC. "If the antibiotic hits both targets at the same concentration, then the bacteria lose their ability to become resistant via the acquisition of random mutations in any of the two targets." Macrolones are synthetic antibiotics that combine the structures of two widely used antibiotics with different mechanisms. Macrolides, such as erythromycin, block the ribosome, the protein manufacturing factories of the cell. Fluoroquinolones, such as ciprofloxacin, target a bacteria-specific enzyme called DNA gyrase.... "The main outcome from all of this work is the understanding of how we need to go forward," Mankin said. "And the understanding that we're giving to chemists is that you need to optimize these macrolones to hit both targets." Thanks to long-time Slashdot reader schwit1 for sharing the news.

Read more of this story at Slashdot.

ChatGPT Has Been Integrated Into a Brain Implant

CNET visits a leading-edge company making an implantable brain-computer-interface that's "experimenting with ChatGPT integration..." We previously covered Synchron's unique approach to implanting its brain-computer-interface (BCI) without the need for open brain surgery. Now the company has integrated OpenAI's ChatGPT into its software, something it says is a world's first for a BCI company... Typing out messages word by word with the help of a BCI is still time consuming. The addition of AI is seen as a way to make communication faster and easier by taking in the relevant context, like what was last said in a conversation, and anticipating answers a person might want to respond with, providing them with a menu of possible options. Now, instead of typing out each word, answers can be filled in with a single "click." There's a refresh button in case none of the AI answers are right... [ALS patient Mark, one of 10 people in the world testing Synchron's brain implant in a clinical trial] has noticed the AI getting better at providing answers that are more in line with things he might say. "Every once in a while it'll drop an f-bomb, which I tend to do occasionally," he says with a laugh. Synchron CEO Tom Oxley tells me the company has been experimenting with different AI models for about a year, but the release of OpenAI's ChatGPT-4o in May raised some interesting new possibilities. The "o" in ChatGPT-4o stands for "omni," representative of the fact that this latest version is capable of taking in text, audio and visual inputs all at once to inform its outputs... Oxley envisions the future of BCIs as... having large language models like ChatGPT take in relevant context in the form of text, audio and visuals to provide relevant prompts that users can select with their BCI... Synchron's BCI is expected to cost between $50,000 and $100,000, comparable with the cost of other implanted medical devices like cardiac pacemakers or cochlear implants. CNET has also released a video — titled "What It's Like Using a Brain Implant With ChatGPT."

Read more of this story at Slashdot.

❌