"I realized that a lot of the civilizations we were talking about sat right along major tectonic plate boundaries," says Force, who is now affiliated with the University of Arizona, Tucson.

“我认识到现在谈论的很多文明正好位于主要地质板块的边界附近。”现在图森亚利桑那大学的佛思说。

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"Life on Earth has radiated into every conceivable - and in some cases almost inconceivable - ecological niche," says Chris Impey of the University of Arizona in Tucson, US.

“地球上的生命已经涉足所有可想象的——某些情况下几乎不可想象的——生态环境。”美国图森市亚利桑那州大学的Chris Impey说。

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The University of Arizona, Tucson, which operates HiRISE, has just released a new batch of these photos taken in the last several months.

土桑市亚利桑那大学近日发布了过去几个月运用HiRISE所拍摄的一批最新火星表面照片。

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Tucson, Arizona (CNN) -- It's the week before finals at the University of Arizona in Tucson, and all over campus, students are hunched over books and laptops under the shelter of immense palm trees and sprawled out on the cement benches lining the campus' long, grassy mall, the anticipation palpable.

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