Alien life may have already been replaced by ROBOTS, Astronomer Royal claims

Alien life on other planets could be in the form of robots who have outlived their creators, according to the Astronomer Royal. And alarmingly, that is the same fate which may befall people on Earth too. Numerous Hollywood films have presented the possibilities of robots becoming self-aware and deciding to destroy humans so they can rule the world. But Martin Rees, the Astronomer Royal, told Cheltenham Science Festival robots taking over was a possibility. No life beyond Earth has ever been found; there is no evidence that alien life has ever visited our planet.