Allen with engineering models of the (clockwise from bottom) Sojourner rover, a Mars Exploration Rover, and Curiosity in JPL's Mars Yard

December 14, 2020

Bill Allen with engineering models of the (clockwise from bottom) Sojourner rover, a Mars Exploration Rover, and Curiosity in JPL's Mars Yard in the early 2000.

Credits

NASA/JPL-Caltech

ENLARGE

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