Interview with Toby Lewis, global head of threat analysis for Darktrace and former deputy technical director for incident management at the UK’s National Cyber Security Defence Centre, on social media risk and old-fashioned voting safety. Could China-Taiwan tensions hit your Christmas list? Nasa says private ISS missions need astronaut chaperones. Scientists urge prostate cancer public health campaign expansion for earlier detection. Millions of household struggling paying for essential telecomms. Pig organs ‘partially revived by scientists an hour after death’. Great Barrier Reef enjoys record coral cover - but remains highly vulnerable. Tourists descend on London women’s house in online booking scam.

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