digging in a different fashion jupiter ' s robotic arm connected with a hard surface that has scientists thrilled about the prospect of next uncovering an icy pile . " we have built a trench and uncovered a solid layer at the same depth as the water deposited in our other trench , " wrote washington u plastic arm investigator for phoenix , ray arvidson . the hand tried at least three times to penetrate the material , but was unsuccessful . as a further the arm went into a standing configuration , expecting its next commands .
A robotic arm has been used for scientific discoveries.