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We may go to Mars and learn things that may be incredibly important to those who are still here on earth. We never know unless we go and explore.
我們也許會登錄火星，了解對地球，對萬物都十分重要的事情。只有去探索，否則永遠不會知道。
Mars is the test of whether life naturally evolves from chemistry where ever you have the right physical and chemical conditions. That will mean the universe is filled with life. We can prove this by going to Mars.
火星是一場檢測生命是否通過化學反應自然進化而來的實驗。化學反應既能創造物理條件，也能創造化學條件。這也意味著宇宙之大，處處皆生命。我們可以通過登錄火星來證明這一點。
Chris Mckay is a planetary scientist at NASA's Ames research center in California. Robert Zubrin is President of the Mars Society. Both believe that there may have once been some form of life on Mars.
克里斯·麥克凱伊是美國宇航局艾姆斯研究中心的行星科學家。羅伯特·祖布林是火星協會主席。兩人都相信火星上曾有生命存在。
One of the components of life as we know it is water. NASA probes have concluded that there is ice on the planet poles and there appears to be liquid water just below the planet's surface.
我們知道生命的組成成分是水。NASA探測器在火星兩極探測到冰層，似乎在火星地表以下也發現了液態水。
Mars today is a polar desert. There is water on Mars but it's all frozen into the soil as ice or permafrost.
如今的火星是極地沙漠。火星上雖有水，但被凍結到土壤里，變成冰或者永久凍土。
We know that early in Mars' history it had water, we think it had life. That opens up the question of bringing it back to life, making Mars in the future more like earth is now. This is sometimes called terraforming. The basis of terraforming is the notion that early in Mars' history it had life and it's recently dead. Recently for Mars means a couple of millions years.
我們知道早期的火星上有水，有水就有生命。這就打開了將生命重新帶回火星這一問題。改造火星，使它更像地球，有時稱之為地造。地造的基礎在于早期的火星有生命，近年來生命才絕跡這一理念。對火星來說近年來就是上百年。
Mckay believes that after all that time life could actually be revived on Mars. The fundamental problem in bringing Mars back to life is warming it up. Mars is too cold.
麥克凱伊認為經過漫長的歲月，火星可以重燃生命。讓火星重現生機的根本性問題在于讓火星變暖，因為火星上十分嚴寒。
Meanwhile, because of global warming, the atmosphere on our own planet is getting too hot. We humans have learned how to warm our planet. We're doing it on earth with super green house gases.
然而，因為全球氣候變暖地球的環境溫度日益升高。人類知道怎樣將地球變暖。我們釋放溫室氣體來使地球變暖。
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