excavation in a different grave phoenix ' s aerial arm connected with a soft surface that has scientists excited about the chance of next uncovering an icy layered . " we have dug a hole and discovers a hard layer at the same depth as the cold layers in our other trench , " spoke potomac university robotic tool investigator for nasa , ross arvidson . the athlete tried at any three times to escape the layer , but was ineffective . as a result the tool went into a setting cycle , awaiting its next assignment .
A robotic arm has been used for scientific discoveries.