Nasa's Mars Exploration Rover Spirit detected the carbonate-rich rocks in the Columbia Hills of Gusev Crater.

美国航空航天局的火星探险号飞船在古谢夫陨石坑的哥伦比亚山探测到富含碳酸盐的石头。

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2003 - The Spirit Rover is launched, beginning NASA's Mars Exploration Rover mission.

2003年的今天，勇气号发射升空，开始了美国航空航天局的“火星探索漫游”计划。

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At this very hour, the Mars exploration rover Spirit is searching for evidence of life beyond the Earth.

CNN: Bush: 'It is time for America to take the next steps' in space

"You take what Mars gives you, " said Squyres, also the lead scientist on the Mars Exploration Rover Mission, which includes Spirit and Opportunity.

CNN: Rover Curiosity near Mars landing

Before Curiosity, NASA's big rover project was the Mars Exploration Rover Mission: two golf-cart-sized rovers called Spirit and Opportunity.

CNN: What we've done on Mars, and what's next