Throughout history, people have feared that civilization, human life, and even planet Earth could one day come to an end, either as a result of natural, manmade, or supernatural causes. Catastrophic doomsday scenarios include antibiotic resistant super-bacteria devastating humanity and runaway global warming rendering Earth’s climate uninhabitable. Among the more bizarre potential threats is what field of science, which some fear will give rise to out-of-control, self-replicating robots? Discuss