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International delegates agree leap second no longer tenable, but first leap hour not likely to happen for thousands of years After decades of discussion, quibbling and worrying about clocks in computer systems, the world’s official timekeepers have voted to replace what many viewed as a tiresome correction: the leap second.Continue Reading

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Experts say the technology could help terrorists and nation states with production but that significant hurdles remain In his annual speech on threats to the nation, Sir Ken McCallum, the head of the UK’s intelligence service, MI5, warned that AI had the potential to “change the stakes” on existing andContinue Reading

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Russia’s silence over the death of a lab worker underlines that pandemic preparedness amounts to nothing if information on threats is withheld In pandemic preparedness work, scientists like to focus on the technical challenges: identifying pathogens, diagnosing infections, understanding their effects and developing vaccines and treatments. Each step promises progressContinue Reading

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Could a drug intended to prevent painful rashes also protect our brains as we get older? The signs are promising – but not conclusive. Yet that’s enough to be driving a boom in shingles jabs When Jenny, a 50-year-old marketing and branding professional from Cambridge, went for her shingles vaccineContinue Reading

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From blood pressure to ageing, research suggests the first 1,000 days of sugar exposure could leave a decades-long mark on health They were born into a Britain still recovering from the hardships of war. Though the air-raid sirens had fallen silent, many everyday foods remained rationed, including sugar. Adults wereContinue Reading