Video edited by Jenifer Hahn. (video link)
OCOTILLO WELLS, Calif.—The area of the Southern California desert we were standing in made for a decent visual fill-in for the Red Planet—simply change the tint of the landscape and get rid of the sparse scrub on the nearby hillsides. At this site in a large, open-air mine near the Salton Sea, a few people in hard hats were gathered around a tall stand with a tether in the middle that dropped into a small hole in the ground.
The area was silent except for a hum of a large compressor. "That's for cooling," explained Kris Zacny, an engineer for Honeybee Robotics. "We won't need cooling on Mars."
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