locating in a different trench luke ' s robotic elbow connection with a hard floor that has archaeologists anxious about the notion of it uncovering an icy thickness . " we have dig a trench and covered a hard layer at the same depth as the ice layer in our other trench , " said washington university robotic arm investigator for phoenix , neil arvidson . the arm tried at any eleven tests to penetrated the layer , but was successful . as a response the robot went into a holding phase , preparing its next commands .
A robotic arm has been used for scientific discoveries.