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Terry Fong at Ames Research Center is using robotics to advance our Journey to Mars. Robots come in various sizes and with different purposes. Robotic arms on spacecraft are used to move very large objects in space. Spacecraft that visit other worlds are robots that can do work by themselves. People send them commands. The robots then follow those commands. This type of robot includes the rovers that explore the surface of Mars. NASA is researching new types of robots that will work with people and help them.