Ron Li, Mars Exploration Rover (MER) science team member from Ohio State University, discusses the team's latest finding from the Mars Rover, "Opportunity" during a press conference at the Jet Propulsion Laboratory (JPL) in Pasadena, California on Friday, 30 January 2004. There is reportedly evidence of mineral deposits that may prove there was water on Mars. Photo by Francis Specker

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Photo credit: © Francis Specker / Alamy / Afripics
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Keywords: 2004, america, exploration, jet, jpl, lab, li, mars, nasa, pasadena, planet, portrait, propulsion, ron, rover, science, states, united, usa