NASA said Tuesday that engineers noticed a power surge in
Opportunity's left front wheel and decided to pull it out of the
crater before it got stuck. Its twin rover, Spirit, lost function
in its right front wheel in 2006 after a similar surge.
Opportunity descended into Victoria Crater last September and
inspected bright rock layers. Once it emerges, it will study loose
rocks on the equatorial plains.
Opportunity and Spirit landed on Mars in 2004 and have operated
beyond their original 90-day mission.
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