Controversial Harvard Professor Avi Loeb ruffled feathers after claiming metal spherules at the bottom of the Pacific Ocean were alien tech. Now, there's another theory.
Mankind could be wiped out if artificial intelligence and alien AI `bypass humanity dailystar.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from dailystar.co.uk Daily Mail and Mail on Sunday newspapers.