 This is beneficial because nuclear probes are not allowed for testing in Antarctica as a result of the Antarctic Treaty.Phase 2 of project VALKYRIE consisted of testing a scaled-down version of the cryobot in Matanuska Glacier, Alaska in 2015.Following the success of these missions, Phase 3 of the project is then used a full-scale version of the cryobot to melt its way to a subglacial lake, collect samples, and then resurface.