As Britain’s death toll from Covid-19 passes 100,000, there is one burning question: why did so many have to die? Tom Clark, Gaby Hinsliff and Philip Ball chart the persistent failures—from both the chief scientists and the politicians. Former head of the Supreme Court Brenda Hale takes on the human rights sceptics and Rana Mitter asks whether China's grip on Hong Kong means the end of the historic freedoms in the city.
When artificial intelligence began beating the world’s greatest players, a chess grandmaster devised his own way to give human ingenuity an upper hand against the machine. The result, however, was not quite what he expected