Social media grilled by senators, bitcoin booms, TikTok parental controls & a robot to help social distancing

Facebook and Twitter chief executives are grilled again by Senators, who attacked their corporate policies. Donald Trump fires a top election security tech official who contradicted him. Bitcoin hits nearly a three-year peak, and closes in on a record high value. The French flying ‘Jetman’ has died in a training accident in Dubai. TikTok has added tougher controls for parents to keep tabs on their children.

Dinosaurs would have continued breeding on Earth when they were wiped out by asteroid, study finds. A robot is enforcing mask-wearing and social distancing at store in Japan.

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