DARPA   September 26, 2018 DARPA has selected nine teams to compete in the Subterranean (SubT) Challenge  – seven in the physical Systems track and two in the Virtual track – to develop new approaches to rapidly map, navigate, and search underground environments to better equip warfighters and first responders to explore human-made tunnel systems, urban underground, and natural cave networks. The teams will design and develop novel solutions that address the challenges of subterranean environments in tunnel systems, urban underground, and natural cave networks, culminating with a final event encompassing elements from all three environments… read more.