Black Friday’s relentless smartphone advertising, and why annual upgrades harm the Earth. WHO asks China for answers about a mystery outbreak of respiratory illness. The quick way to boost brain power after a bad night’s sleep. The AI that watches Youtube for you. Also in this episode:

• World's biggest iceberg is on the move after 30 years
• Astronomers detect mysterious high-energy particle falling to Earth from space
• Peloton CEO apologises after Thanksgiving world record attempt fails
• Study: 20 minutes of exercise can boost brain power after bad night’s sleep
• UK to build new instrument to aid search for life on Mars

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