Life has been building self-replicating machines for billions of years. Yet Earth has never turned into gray goo. AI researcher @herbiebradley explains what that says about the risk of self-replicating AI machines: "There is some slightly more nearer term thing of smaller scale experiments, small organisms that could be controlled by AI or above the nanoscale, but still small. You could have some form of self-replicating machines which are not nanoscale, which occur earlier." Theo: "Or like…