A news article about a doctor who died after receiving a Covid-19 vaccination was Facebook's most viewed link in the US in the first quarter of 2021, a previously shelved report shows. The piece - updated after a report said there was no proven link to the vaccine - was popular with vaccine sceptics. The New York Times claimed that Facebook initially held back its report because it would "look bad". Facebook said the delay was in order to make "key fixes". The company had already published its "Widely Viewed Content" report for the second quarter of 2021, in which it found a word search promising to reveal "your reality" was the most popular post. Similarly frivolous "question posts" formed most of the top 20. View original tweet on Twitter ...

Virgin Hyperloop has released a video illustrating its plans for passenger pods using magnetic levitation to travel above 1,000km/h (600mph) through tubes containing a near-vacuum. Rather than connecting to form a train, the pods will travel in convoy, able to leave and join a static track individually, like cars on a motorway. Last year, Virgin Hyperloop completed its first crewed test-track journey, reaching speeds of 170km/h. View original tweet on Twitter Railway engineer and writer Gareth Dennis tweeted it was "a glossy video that says, 'Everything works and is great,' with nothing more than some CGI [computer-generated imagery] and a giant winky face". He questioned the vision of carrying "tens of thousands of passengers per hour per direction", which "would require a th...