Elon Musk warns of Twitter bankruptcy as more senior executives quit while US regulators say billionaire is ‘not above the law’.

House of the Dragon VFX supervisor explains the challenges they faced during the series and History Channel divers find a piece of the exploded space shuttle Challenger.

Also in this episode:

• ‘Overweight’ neutron star defies a black hole theory
• 'Leap forward' in tailored cancer medicine
• Company using AI to make apps for businesses explains importance of how we use the technology
• Stirling becomes a ‘fully augmented reality city’
• The science behind why some monkeys are nicer than others

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