In this photo provided by the University of Hawaii, six scientists celebrate as they exit from their Mars simulation habitat on slopes of Mauna Loa on the Big Island, Hawaii, Aug. 28, 2016. (Photo/Agencies)
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In this photo provided by the University of Hawaii, six scientists celebrate as they exit from their Mars simulation habitat on slopes of Mauna Loa on the Big Island, Hawaii, Aug. 28, 2016. (Photo/Agencies)
