Two attacks by Ukrainian drones against Russian warships have been thwarted according to Moscow.

By John Irish PARIS (Reuters) -France's foreign minister said on Tuesday that France had prevented a hybrid digital attack on

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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 King has hailed artificial intelligence (AI) as “one of the greatest technological leaps in the history of human endeavour” but warned of the urgent need to work together to combat its “significant risks”. In a video message for the opening session of the AI Safety Summit at Bletchley Park, the King stressed the need to make sure the technology remained “safe and secure”, and said the speed of its advancement could surpass even human understanding. He likened the “rapid rise of powerful artificial intelligence” to the world’s greatest scientific breakthroughs including the discovery of electricity and the splitting of the atom – and even the harnessing of fire. And he spoke of its potential to “transform life as we know it” for the better, possibly leading to cures for cancer and other diseases, and helping to create green energy. Charles, in footage recorded at Buckingham Palace before he left for his state visit to Kenya, said: “We are witnessing one of the greatest technological leaps in the history of human endeavour. “The rapid rise of powerful artificial intelligence is considered by many of the greatest thinkers of our age to be no less significant, no less important, than the discovery of electricity, the splitting of the atom, the creation of the world wide web, or even the harnessing of fire.” He added: “AI holds the potential to completely transform life as we know it to help us better treat, and perhaps even cure, conditions like cancer, heart disease and Alzheimer’s; to hasten our journey towards net zero and realise a new era of potentially limitless clean, green energy – even just to help us make our everyday lives a bit easier. “However, if we are to realise the untold benefits of AI, then we must work together on combating its significant risks too.” The AI summit sees representatives of nearly 30 countries, including the US, France and China, meeting with leading AI companies and civic society groups to discuss the risks of the emerging technology. Delegates have already agreed on a world-first statement – the “Bletchley declaration on AI safety” – it was announced on Wednesday. The King thanked those attending for laying the foundation for a consensus to ensure “this immensely powerful technology is, indeed, a force for good in this world”. Highlighting the need to keep on top of the technology, the King said: “AI continues to advance with ever greater speed towards models that some predict could surpass human abilities, even human understanding. “There is a clear imperative to ensure that this rapidly evolving technology remains safe and secure.” He said transitions such as AI always presented “profound challenges, especially in preparing for unintended consequences”. But Charles said: “It is incumbent on those with responsibility to meet these challenges: to protect people’s privacy and livelihoods, which are essential to both our economic and psychological well-being, to secure our democracies from harm, and to ensure the benefits of new technology are shared by all.” Describing the international community’s co-operation on climate change, the King added: “We must similarly address the risks presented by AI with a sense of urgency, unity and collective strength.” Read More Kamala Harris arrives in the UK ahead of AI safety summit Study finds ‘deepfakes’ from Ukraine war undermining trust in conflict footage More than 500 potential cyber attacks logged every second, BT says AI being used to create child abuse imagery, watchdog warns ChatGPT and other chatbots ‘can be tricked into making code for cyber attacks’ Tinder adds Matchmaker feature to let friends recommend potential dates

NEW YORK--(BUSINESS WIRE)--Aug 9, 2023--

'Y’all had no idea?' Adin Ross said after he leaked the alleged date and location for the UFC 294 Kamaru Usman vs Khamzat Chimaev fight by mistake

TikTok aims to provide its users with greater control over their search records