What is the main idea for this paragraph? explosions. car chases. a man and woman, drenched in sweat, limping from a building as it crumbles to the ground, muster the last of their strength to rescue humanity from its inevitable extinction at the cold, metal hands of humanoid creatures with artificial intelligence gone awry. for decades, books and movies have dictated how we think of robots. simply the word "robot" can bring to mind images of evil, mechanical creatures bent on taking over the world and wiping out every glimmer of humanity. and yet, the truth of machines is dramatically different. today's robots hold little in common with their villainous cousins from action-packed science fiction. most robots have no interest in harming the human population at all; they exist to aid people in making life safer, healthier, and more productive.