Alternative 3: to establish a 'Noah's Ark' colony of humanity's best and brightest off of the planet -on Mars.

选择3：在地球之外——火星上建立一座“诺亚方舟”作为人类的最佳和最有前途的聚居地。

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Back from 'Mars' Six men have survived 520 days cooped up in 3 small rooms at the Institute of Biomedical Problems in Moscow, where they were simulating the isolation of a journey to Mars and back.

“火星”归来在莫斯科的生物医学问题研究所6名人员工在经历520天的禁闭，他们被关在3个小房间里模拟拜访火星又返回与世隔绝的旅程。

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From 3 June, the Mars 500 project will send a "crew" of six on a simulated 520-day round trip to the Red Planet and back.

从6月3日起，火星500计划将派遣6名“船员”进行一场环游红色星球并返回的520天模拟旅行。

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First light on Mars occurs at 3:15 a.m.

CNN: Mars' geology 'more like Earth than the moon'

What they found is that about 3% of the total volume of Mars is capable of supporting Earth-based lifeforms.

FORBES: Parts Of Mars May Be Habitable For Earth-Based Life

America's Mars Polar Lander was supposed to touch down on 3 December, 1999.

BBC: Gusev crater (Nasa)