The Spirit and Opportunity rovers landed on the Red Planet in January 2004 for what was to be a 90-day mission, but which has lasted 6 Earth years, or 3.2 Mars years.

勇气号与机遇号探测器在2004年1月登上这红色星球，计划执行一项为期90天的任务，结果这任务持续了地球历6年，或者说3.2个火星年。

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This image was taken in February 2009 by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. It covers an area around.6 miles across.

该照片由美国宇航局火星探测轨道器上的高清晰科学实验成像仪(HRISE)拍摄，摄于2009年2月。

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Millie:(5)I % wonder how many people would like to move to Mars. (6)I think people should know that life on Mars woulci be different from that on the Earth.

米莉：（5）我想知道多少人想搬往火星。（6）我认为人钔应该知道火星上的生活将不同于地球上的生活。 。

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Today, the surface pressure on Mars is 6 millibars.

NPR: Revisiting the Viking Missions to Mars

The 2, 000-pound Mars rover Curiosity made its landing on Mars on August 6, 2012, and has been sending back fascinating images and data ever since.

CNN: Mars may have once supported life, NASA says

See more images sent by the rover:The 2, 000-pound Mars rover Curiosity made its landing on Mars on August 6, 2012, and has been sending back fascinating images and data ever since.

CNN: Mars may have once supported life, NASA says