Artificial Intelligence (AI) is undoubtedly one of the great achievements of science. Yet, shortly before his death, Stephen Hawking said that within a hundred years or so, AI-powered robots will rule the earth, and humans will have to work as their slaves. He said the only way for humans to escape this dire consequence is to colonize Mars, for which the required technology is already available. Do you think Hawking was being unduly pessimistic? Or was he right?