<P> On May 1, 2009, during its fifth mission extension, Spirit became stuck in soft soil on Mars . After nearly nine months of attempts to get the rover back on track, including using test rovers on Earth, NASA announced on January 26, 2010 that Spirit was being retasked as a stationary science platform . This mode would enable Spirit to assist scientists in ways that a mobile platform could not, such as detecting "wobbles" in the planet's rotation that would indicate a liquid core . Jet Propulsion Laboratory (JPL) lost contact with Spirit after last hearing from the rover on March 22, 2010 and continued attempts to regain communications lasted until May 25, 2011, bringing the elapsed mission time to 6 years 2 months 19 days, or over 25 times the original planned mission duration . </P> <P> In recognition of the vast amount of scientific information amassed by both rovers, two asteroids have been named in their honor: 37452 Spirit and 39382 Opportunity . The mission is managed for NASA by the Jet Propulsion Laboratory, which designed, built, and is operating the rovers . </P> <P> On January 24, 2014, NASA reported that current studies by the remaining rover Opportunity as well as by the newer Mars Science Laboratory rover Curiosity will now be searching for evidence of ancient life, including a biosphere based on autotrophic, chemotrophic and / or chemolithoautotrophic microorganisms, as well as ancient water, including fluvio - lacustrine environments (plains related to ancient rivers or lakes) that may have been habitable . The search for evidence of habitability, taphonomy (related to fossils), and organic carbon on the planet Mars is now a primary NASA objective . </P> <P> The scientific objectives of the Mars Exploration Rover mission are to: </P>

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