U.S. Navy to ditch its dolphin and sea lions in favor of robots The U.S. Navy's Marine Mammal Program started back in the '60s, and the dolphins and sea lions in it help defend harbors, retrieve sunken equipment and, most dangerously, identify mines for deactivation. By 2017, the Navy wants robots to do all that, instead. The dolphins and sea lions the Navy uses really pull their weight: they're highly trained, and a team of veterinarians and handlers keep the animals primed and ready to be deployed anywhere in the world. The flip-side to that is that they're also expensive...