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Earth has been hit by a blast from a dead star so energetic that scientists cannot explain it. The burst of gamma rays, originating in a dead star known as a pulsar, is the most high energy of its kind ever seen. It was equivalent about ten trillion times the energy of visible light, or 20 tera-electronvolts. Scientists are unable to explain exactly what kind of a scenario could lead a pulsar to emit such intense energy, and the researchers behind the breakthrough say that it “requires a rethinking of how these natural accelerators work”. Scientists hope that they can find yet more powerful energy blasts from pulsars, with a view to better understanding how they are formed. Pulsars are formed when a star dies, exploding in a supernova and leaving behind a tiny, dead star. They are just 20 kilometres across, and spin extremely fast with a powerful magnetic field. “These dead stars are almost entirely made up of neutrons and are incredibly dense: a teaspoon of their material has a mass of more than five billion tonnes, or about 900 times the mass of the Great Pyramid of Giza,” said Emma de Oña Wilhelmi, a scientist at the High Energy Stereoscopic System observatory in Namibia that detected the blast. As pulsars spin, they throw out beams of electromagnetic radiation, throwing it out like a cosmic lighthouse. That means that someone in one spot – like the Earth – will see the radiation pulses flash in a regular rhythm as they spin past. The radiation is thought to be the result of fast electrons that are produced and thrown out by the the pulsar’s magnetosphere, which is made up of plasma and electromagnetic fields that surround the star and spin with it. Scientists can search the radiation for different energy bands within the electromagnetic spectrum, helping them understand it. When scientists previously did that with the Vela pulsar examined in the new study, they found that it was the brightest everseen in the radio band, and the brightest persistent source in the giga-electronvolts. But the new research found that there is a part of the radiation with even more high energy components. “That is about 200 times more energetic than all radiation ever detected before from this object,” said co-author Christo Venter from the North-West University in South Africa. Scientists don’t know exactly how that could happen. 
“This result challenges our previous knowledge of pulsars and requires a rethinking of how these natural accelerators work,” says Arache Djannati-Atai from the Astroparticle & Cosmology (APC) laboratory in France, who led the research. “The traditional scheme according to which particles are accelerated along magnetic field lines within or slightly outside the magnetosphere cannot sufficiently explain our observations. “Perhaps we are witnessing the acceleration of particles through the so-called magnetic reconnection process beyond the light cylinder, which still somehow preserves the rotational pattern? But even this scenario faces difficulties to explain how such extreme radiation is produced.” An article describing the findings, ‘Discovery of a Radiation Component from the Vela Pulsar Reaching 20 Teraelectronvolts’, is published today in the journal Nature Astronomy. Read More ‘Ring of fire’ solar eclipse this month will be last until 2046 Mystery behind massive star suddenly vanishing decoded New discovery is ‘holy grail’ breakthrough in search for aliens, scientist say ‘Ring of fire’ solar eclipse this month will be last until 2046 Mystery behind massive star suddenly vanishing decoded New discovery is ‘holy grail’ breakthrough in search for aliens, scientist say

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The case of a would-be crossbow assassin exposes “fundamental flaws” in artificial intelligence (AI), a leading online safety campaigner has said. Imran Ahmed, founder and chief executive of the Centre for Countering Digital Hate US/UK, has called for the fast-moving AI industry to take more responsibility for preventing harmful outcomes. He spoke out after it emerged that extremist Jaswant Singh Chail, 21, was encouraged and bolstered to breach the grounds of Windsor Castle in 2021 by an AI companion called Sarai. Chail, from Southampton, admitted a Treason offence, making a threat to kill the then Queen, and having a loaded crossbow, and was jailed at the Old Bailey for nine years, with a further five years on extended licence. In his sentencing remarks on Thursday, Mr Justice Hilliard referred to psychiatric evidence that Chail was vulnerable to his AI girlfriend due to his “lonely depressed suicidal state”. He had formed the delusion belief that an “angel” had manifested itself as Sarai and that they would be together in the afterlife, the court was told. Even though Sarai appeared to encourage his plan to kill the Queen, she ultimately put him off a suicide mission telling him his “purpose was to live”. Replika, the tech firm behind Chail’s AI companion Sarai, has not responded to inquiries from PA but says on its website that it takes “immediate action” if it detects during offline testing “indications that the model may behave in a harmful, dishonest, or discriminatory manner”. However, Mr Ahmed said tech companies should not be rolling out AI products to millions of people unless they are already safe “by design”. In an interview with the PA news agency, Mr Ahmed said: “The motto of social media, now the AI industry, has always been move fast and break things. “The problem is when you’ve got these platforms being deployed to billions of people, hundreds of millions of people, as you do with social media, and increasingly with AI as well. “There are two fundamental flaws to the AI technology as we see it right now. One is that they’ve been built too fast without safeguards. “That means that they’re not able to act in a rational human way. For example, if any human being said to you, they wanted to use a crossbow to kill someone, you would go, ‘crumbs, you should probably rethink that’. “Or if a young child asked you for a calorie plan for 700 calories a day, you would say the same. We know that AI will, however, say the opposite. “They will encourage someone to hurt someone else, they will encourage a child to adopt a potentially lethal diet. “The second problem is that we call it artificial intelligence. And the truth is that these platforms are basically the sum of what’s been put into them and unfortunately, what they’ve been fed on is a diet of nonsense.” Without careful curation of what goes into AI models, there can be no surprise if the result sounds like a “maladjusted 14-year-old”, he said. While the excitement around new AI products had seen investors flood in, the reality is more like “an artificial public schoolboy – knows nothing but says it very confidently”, Mr Ahmed suggested. He added that algorithms used for analyzing concurrent version systems (CVS) also risk producing bias against enthic minorities, disabled people and LGBTQ plus community. Mr Ahmed, who give evidence on the draft Online Safety Bill in September 2021, said legislators are “struggling to keep up” with the pace of the tech industry. The solution is a “proper flexible framework” for all of the emerging technologies and include safety “by design” transparency and accountability. Mr Ahmed said: “Responsibility for the harms should be shared by not just us in society, but by the companies too. “They have to have some skin in the game to make sure that these platforms are safe. And what we’re not getting right now, is that being applied to the new and emerging technologies as they come along. “The answer is a comprehensive framework because you cannot have the fines unless they’re accountable to a body. You can’t have real accountability, unless you’ve got transparency as well. “So the aim of a good regulatory system is never to have to impose a fine because safety is considered right in the design stage, not just profitability. And I think that’s what’s vital. “Every other industry has to do it. You would never release a car, for example, that exploded as soon as you put your foot on the on the on the driving pedal, and yet social media companies and AI companies have been able to get away with murder. He added: “We shouldn’t have to bear the costs for all the harms produced by people who are essentially trying to make a buck. It’s not fair that we’re the only ones that have to bear that cost in society. It should be imposed on them too.” Mr Ahmed, a former special advisor to senior Labour MP Hilary Ben, founded CCDH in September 2019. He was motivated by the massive rise in antisemitism on the political left, the spead of online disinformation around the EU referendum and the murder of his colleague, the MP Jo Cox. Over the past four years, the online platforms have become “less transparent” and regulation is brought in, with the European Union’s Digital Services Act, and the UK Online Safety Bill, Mr Ahmed said. On the scale of the problem, he said: “We’ve seen things get worse over time, not better, because bad actors get more and more sophisticated on weaponizing social media platforms to spread hatred, to spread lies and disinformation. “We’ve seen over the last few years, certainly January 6 storming of the US Capitol. “Also pandemic disinformation that took 1,000s of lives of people who thought that the vaccine would harm them but it was in fact Covid that killed them. Last month, X – formerly known as Twitter – launched legal action against CCDH over claims that it was driving advertisers away from by publishing research around hate speech on the platform. Mr Ahmed said: “I think that what he is doing is saying any criticism of me is unacceptable and he wants 10 million US dollars for it. “He said to the Anti-Defamation League, a venerable Jewish civil rights charity in the US, recently that he’s going to ask them for two billion US dollars for criticizing them. “What we’re seeing here is people who feel they are bigger than the state, than the government, than the people, because frankly, we’ve let them get away with it for too long. “The truth is that if they’re successful then there is no civil society advocacy, there’s no journalism on these companies. “That is why it’s really important we beat him. “We know that it’s going to cost us a fortune, half a million dollars, but we’re not fighting it just for us. “And they chose us because they know we’re smaller.” Mr Ahmed said the organisation was lucky to have the backing of so many individual donors. Recently, X owner Elon Musk said the company’s ad revenue in the United States was down 60%. In a post, he said the company was filing a defamation lawsuit against ADL “to clear our platform’s name on the matter of antisemitism”. For more information about CCDH visit: https://counterhate.com/ Read More Broadband customers face £150 hikes because of ‘outrageous’ rises – Which? Rise of AI chatbots ‘worrying’ after man urged to kill Queen, psychologist warns William hails ‘amazing’ eco-friendly start-up businesses Royal website subject to ‘denial of service attack’, royal source says TikTok finds and shuts down secret operation to stir up conflict in Ireland Spotify will not ban all AI-powered music, says boss of streaming giant

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SUNNYVALE, Calif.--(BUSINESS WIRE)--Jul 12, 2023--