An investigation by Facebook security researchers shows Chinese hackers used spyware to target Uyghur activists and journalists living in the United States. Twitter’s Jack Dorsey launches own online poll during Congress grilling. Six-month-old babies are youngest participants in Pfizer’s trials of children’s Covid vaccine. Rare elephant breeds being driven to extinction by ivory poachers, conservationists warn. Three-minute gadget deliveries by drone being tested. Facial recognition: 700-year-old Scottish skulls found in graveyard dig have faces reconstructed. Do not try this at home - the video game streamer online for 10 days.

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