This volume offers a behind-the-scenes look at the cutting edge of robotics today, debunking commonly held myths and exploring the rapidly changing relationships between humans and machines. The author takes us to extreme environments -- high atmosphere, deep ocean, and outer space -- to reveal where the most advanced robotics already exist. In these environments, scientists use robots to discover new information about ancient civilizations, to map some of the world's largest geological features, and even to "commute" to Mars to conduct daily experiments. But these tools of air, sea, and space also forecast the dangers, ethical quandaries, and unintended consequences of a future in which robotics and automation suffuse our everyday lives. The author argues that the stark lines we've drawn between human and not human, manual and automated, aren't helpful for understanding our relationship with robotics.