地球的力量 第5集稀有行星（3）:稀有地球理論

It's only a question of finding them.But now, there'sa new theory.

問題只是找沒找到 但是現(xiàn)在有種新的理論

It's called the Rare Earth Theory.

像我們這樣的星球可能很稀少這就是稀有地球理論

It says that simple life, like bacteria,

該理論認為像細菌一樣的簡單生命

the type of slime I'veseen in hot volcanic pools,may be common in the universe.

我曾在火山泥漿潭里看到的那種粘性物質(zhì) 可能在宇宙隨處可見

But for complex life like plants and animals to evolve

但是復雜生命像植物和動物如果進化

requires an extraordinary sequence of events.

則需要大量事件發(fā)生

A nd ha ving tra veiled the world to make this series,

在環(huán)游世界制作這個系列節(jié)目的時候

what strikes me most is the incredible good fortune

我最大的感觸是地球

it's taken to make our planet a home for such rich and diverse life.

能夠成為如此豐富多樣生命的家 真是不可思議的好運氣

To get an idea of just how lucky Earth has been,

為了能夠明白地球有多么幸運

let me take you back to what I reckon is the most important day in Earth's history.

讓我?guī)銈兓氐?我所認為的地球歷史上最重要的一天

This one day was responsible for much of what makes Earth so special.

讓地球如此特別大部分原因歸功于這一天

And yet, it was just a chance event.

但是，這只是偶然的事件