Impacts by meteorites represent one mechanism that could cause global catastrophes and seriously influence the evolution of life all over the planet.

陨石的撞击代表了一种可能导致全球性灾难并严重影响地球上所有生命进化的机制。

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Some scientists suggested that there had been a gradual evolution of life on earth.

一些科学家认为，地球上的生命是逐渐进化的。

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The evolution of life on earth, or of human society, is a unique historical process.

地球上的生命进化或者人类社会的进化，只是一个单独的历史过程。

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He developed the theory of evolution that life on Earth developed through the process of natural selection.

VOA: special.2009.12.16

The exhibit includes a movie about Elvis' life and the evolution of his representation by the media.

VOA: special.2010.04.02

On stage,Milner tells the story through music. Darwin's theory of evolution through natural selection inspires some tunes,and episodes in his life inspire others.

VOA: standard.2009.11.25

By studying the relationship between atmosphere and terrain, researchers hope to learn more about the evolution of life in its earliest stages, and inspire curious minds to turn their eyes toward Titan.

ENGADGET

In Life Everywhere he offers a strong countervailing note of optimism, supported by most astrobiologists' view of evolution: Life on Earth has demonstrated a tendency for ever-greater complexity.

FORBES: We've Got Company

You have to consider that for three billion years of our own evolution, the entire continuum of life here was microbiological, so I'd expect to find something like that.

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