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Why Do Women Outlive Men? A Study of 1,176 Species Points to an Answer

2 weeks 5 days ago
An anonymous reader shared this report from the Washington Post: Women tend to live longer than men. There are traditional explanations: Men smoke more. They drink more. They tend to engage in riskier behavior. But the fact that this lifespan gap holds true regardless of country or century indicates something deeper is also at play. A growing body of evidence suggests that women's relative longevity may derive, in part, from having double X chromosomes, a redundancy that protects them against harmful mutations. That theory was further bolstered Wednesday with the publication of the most sweeping analysis to date of the lifespan differences between males and females in more than 1,000 mammal and bird species... If a baby has a pair of X chromosomes, she's a girl. If the baby inherits an X chromosome and a Y chromosome, he's a boy. In birds, however, the situation is reversed. Female birds have a pair of unlike sex chromosomes while males have the like pair... For their study, Colchero, Staerk and their colleagues collected data on the lifespans of 528 mammal species and 648 bird species kept in zoos. The team found that most other mammals are like humans, with the females of nearly three-fourths of mammal species outliving their male counterparts. But in birds, 68 percent of species studied showed a bias toward male longevity, as expected from their chromosomal makeup.

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EditorDavid

The School That Replaces Teachers With AI

2 weeks 5 days ago
Long-time Slashdot reader theodp writes: CBS News has a TL;DR video report, but Jeremy Stern's earlier epic Class Dismissed [at Collosus.com] offers a deep dive into Alpha School, "the teacherless, homeworkless, K-12 private school in Austin, Texas, where students have been testing in the top 0.1% nationally by self-directing coursework with AI tutoring apps for two hours a day. Alpha students are incentivized to complete coursework to "mastery-level" (i.e., scoring over 90%) in only two hours via a mix of various material and immaterial rewards, including the right to spend the other four hours of the school day in 'workshops,' learning things like how to run an Airbnb or food truck, manage a brokerage account or Broadway production, or build a business or drone." Founder MacKenzie Larson's dream that "kids must love school so much they don't want to go on vacation" drew the attention of — and investments of money and time from — mysterious tech billionaire Joe Liemandt, who sent his own kids to Larson's school and now aims to bring the experience to rest of the world. "When GenAI hit in 2022," Liemandt said, "I took a billion dollars out of my software company. I said, 'Okay, we're going to be able to take MacKenzie's 2x in 2 hours groundwork and get it out to a billion kids.' It's going to cost more than that, but I could start to figure it out. It's going to happen. There's going to be a tablet that costs less than $1,000 that is going to teach every kid on this planet everything they need to know in two hours a day and they're going to love it. "I really do think we can transform education for everybody in the world. So that's my next 20 years. I literally wake up now and I'm like, I'm the luckiest guy in the world. I will work 7 by 24 for the next 20 years to fricking do this. The greatest 20 years of my life are right ahead of me. I don't think I'm going to lose. We're going to win." Of course, Stern writes at Collosus.com, there will be questions about this model of schooling, but asks: "Suppose that from kindergarten through 12th grade, your child's teachers were, in essence, stacks of machines. Suppose those machines unlocked more of your child's academic potential than you knew was possible, and made them love school. Suppose the schooling they loved involved vision monitoring and personal data capture. Suppose that surveillance architecture enabled them to outperform your wildest expectations on standardized tests, and in turn gave them self-confidence and self-esteem, and made their own innate potential seem limitless.... Suppose poor kids had a reason to believe and a way to show they're just as academically capable as rich kids, and that every student on Earth could test in what we now consider the top 10%. Suppose it allowed them to spend two-thirds of their school day on their own interests and passions. Suppose your child's deep love of school minted a new class of education billionaires. "If you shrink from such a future, by which principle would you justify stifling it?"

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EditorDavid

CNN Warns Food Delivery Robots 'Are Not Our Friends'

2 weeks 5 days ago
The food delivery robots that arrived in Atlanta in June "are not our friends," argues a headline at CNN. The four-wheeled Serve Robotics machines "get confused at crosswalks. They move with the speed and caution of a first-time driver, stilted and shy, until they suddenly speed up without warning. Their four wheels look like they were made for off-roading, but they still get stuck in the cracks of craggy sidewalks. Most times I see the bots, they aren't moving at all... " Cyclists swerve to avoid them like any other obstacle in the road. Patrons of Shake Shack (a national partner of Serve) weave around the mess of robots parked in front of the restaurant to make their way inside and place orders on iPads... The dawn of everyday, "friendly" robots may be here, but they haven't proven themselves useful — or trustworthy — yet. "People think they are your friends, but they're actually cameras and microphones of corporations," said Joanna Bryson, a longtime AI scholar and professor of ethics and technology at the Hertie School in Berlin. "You're right to be nervous..." When robots show up in a city, it's often not because the residents of said city actively wanted them there or had a say in their arrival said Edward Ongweso Jr. [a researcher at the Security in Context initiative, a tech journalist and self-proclaimed "decelerationist" urging a slower rollout for Silicon Valley tech pioneers and civic leaders embracing untested and unregulated technology]... "They're being rolled out without any sort of input from people, and as a result, in ways that are annoying and inconvenient," Ongweso Jr. said. "I suspect that people would feel a lot differently if they had a choice ... 'what kind of robots are we interested in rolling out in our homes, in our workplaces, on our college campuses or in our communities?'" Delivery robots aren't unique to Atlanta. AI-driven companies including Avride and Coco Robotics have sent fleets of delivery robots to big cities like Chicago, Dallas and Jersey City, as well as sleepy college towns... "They're popping up everywhere," Ongweso Jr. continued, "because there's sort of a realization that you have to convince people to view them as inevitable. The way to do that is to just push it into as many places as possible, and have these spectacle demonstrations, get some friendly coverage, try to figure out the ways in which you're selling this as the only alternative.... If you humanize it, you're more willing to entertain it and rationalize it being in your area — 'That's just Jeffrey,' or whatever they name it — instead of seeing it for what it is, which is a bunch of investors privately encroaching on a community or workplace," Ongweso Jr. said. "It's not the future. It's a business model." Serve Robotics CEO Ali Kashani told CNN their goal in Atlanta was reducing traffic — and that the robots' average delivery distance there was under a mile, taking about 18 minutes per delivery. Serve Robotics has also launched their robots in Chicago, Los Angeles, Miami, Dallas-Fort Worth and Atlanta, according to the site Robotics 247, as part of an ongoing collaboration with Uber Eats. (Although after the robots launched in Los Angeles, a man in a mobility scooter complained the slow-moving robot swerved in front of him.) And "residents of other cities have had to rescue them when they've been felled by weather," reports CNN. CNN also spoke to Dylan Losey, an assistant professor of mechanical engineering at Virginia Tech who studies human-robot interaction, who notes that the robots' AI algorithms are "completely unregulated... We don't know if a third party has checked the hardware and software and deemed the system 'safe' — in part because what it means for these systems to be 'safe' is not fully understood or standardized." (CNN's reporter adds that "the last time I got close to a bot, to peer down at a flier someone left on top of it, it revved at me loudly. Perhaps they can sense a hater.") But Serve's CEO says there's one crucial way robot delivery will be cheaper than humans. "You don't have to tip the robots."

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EditorDavid