For more than a century, Tyrannosaurus rex has been the King of Dinosaurs, the carnivorous symbol of an entire age in the history of life on Earth.

近一个多世纪以来，雷克斯暴龙不但成为了恐龙帝国的统治者，更是整个地球生命史的肉食象征。

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Why isn't there more variety of life on Earth?

为什么地球上没有更多不同种类的生命形式？

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There was also a cost to the rest of life on Earth.

地球上的其余生命也在为此付出代价。

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It uses objects from the museum's collection to show how Darwin helped us understand the history of life on Earth.

VOA: special.2009.12.01

There's a short story by the science fiction writer Orson Scott Card, where the basic point of the story is that of all the life forms in the universe, we, here on Earth, are the only ones that are mortal.

科幻作家Orson，Scott，Card写了一个短故事，该故事的主旨是,在宇宙的所有生命形式中，我们，在地球上是唯一终有一死的生命。

耶鲁公开课 - 死亡课程节选

They are the reason for the many different kinds of life on Earth.

VOA: special.2009.12.01

Those Hubble measurements would reveal whether signs of life on Earth -- signs of us!

CNN: A transit of Venus, an age of wondrous science

It is a celebration of life on earth and of the value of biodiversity for our lives.

UNESCO: International Year of Biodiversity 2010

Discussing the purpose of life on earth, its unwieldiness regularly defeats the best efforts of famous maestros.

ECONOMIST: Gilbert Kaplan