"I love my work during the day," he said. "But I lie awake at night, feeling terrified that my work may lead to gigadeath." So why not change jobs? De Garis paused, and his answer came slowly, devoid of his customary impetuosity. "Personally, as a human being, I don't want humans to be swatted like mosquitoes," he said. "But humans should not stand in the way of a higher form of evolution. These machines are god-like. It is human destiny to create them."