Robots are already being used for search & rescue missions. In the future, they will be used to autonomously explore pits, caves, and subsurface terrains on this planet and others in our solar system. Team CoSTAR is working on autonomous subsurface explorers. The idea is to use these robots for both planetary exploration and terrestrial applications.
Must see robots & drones:
Next Generation Robots: Autonomous Subsurface Explorers
The above video shows some of these robots in action. More information is available here.
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