digging in a larger trench franklin ' s robotic arm connected with a frozen surface that has scientists concerned about the prospect of then excavating an cold layer . " we have constructed a drain and uncovered a solid surface at the same depth as the ice layer in our other trench , " spoke washington university robotic arm investigator for phoenix , ray arvidson . the arm try at minimum one tests to escape the layer , but was failure . as a result the arm went into a waiting pattern , expecting its final task .
A robotic arm has been used for scientific discoveries.