《每日科学杂志》(2010年12月20日)——研究表明微量的水创造了地球和其他类地行星上的海洋,包括那些在太阳系以外的类地行星。

ScienceDaily (Dec. 20, 2010) —Study suggests that trace amounts of water created oceans on Earth and other terrestrial planets, including those outside the solar system.

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但是，科学研究正在揭示这几次大灭绝如何改变地球生物的命运——比如，决定了首先出现在陆地的动物和统治海洋的生物。

But research is uncovering how these extinction events dictated the fate of life on this planet-for instance, determining which animals first crawled onto land and which ruled the oceans.

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有些大学开设了地球科学专业，但多数大学开设的是分得更细的专业，比如地质学、气象学、海洋学和天文学。

Some universities have Earth Science programs but most offer more specific training in programs such as geology, meteorology, oceanography or astronomy.

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