Z博士的脑洞｜人口政策②：人多是本钱还是麻烦？ sina.com.cn - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sina.com.cn Daily Mail and Mail on Sunday newspapers.
LONDON In March 2020, as COVID-19 locked down the world, what may have been the first autonomous drone attacks in history were taking place on a largely…