A 3D-printed mini-rover, plus other technology news

Omar Mehtab looks at some of the week’s best technology news stories including:

TikTok allows some users to record longer videos as part of a test run
Apple says the NHS Covid-19 app was the second most downloaded iPhone app in the UK this year
The European Space Agency allows people to 3D print a mini replica of their Rosalind Franklin Rover to use at home

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