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The first distant planet was discovered in 1995.
第一個遙遠的行星發現于1995年
Since then, hundreds more have been found.
從那以后，又發現了上百個
This, I think, is a pretty exciting discovery.
我認為這些都是相當令人興奮的發現
It could be an coverage of a major break through.
這可能會是一個重大的突破
One that will both redefine our view of life in the universe
這會讓我們重新界定我們的宇宙生命觀
and be a real triumph for science itself.
也會是科學真正的成功
Somewhere out there, perhaps not so far away,
在外太空的某處，或許并不遠
is a rocky planet a bit like earth,
有一顆類似于地球的巖態行星
a planet with liquid water,
一顆擁有液態水的行星
where life has begun.
而生命就在那里起源
Due to the power of evolution,
由于適者生存的進化作用
aliens here might be surprisingly familiar,
這里的外星人可能看上去非常的熟悉
even if, at first, they seem anything but.
即便它們最初看起來很不一樣
Aliens that eat, for example, need an input orifice,
例如，外星人需要一個進食口進食
or, as most people say, a mouth.
或者，也就是我們所說的，一張嘴
Likewise, if they live on a solid surface,
同樣，如果他們生活在固態地表的話
they'll probably have legs.
他們很可能是有下肢的
The detail might be different,
下肢的具體情況可能會有所不同
but legs are good things to have on land,
但在陸地上行動，下肢還是非常有用的
especially if the animal is clinging to the side of a cliff.
特別是在動物攀爬峭壁的時候
If the planet is well-lit,
如果行星上光線較好
eyes are almost guaranteed.
那么擁有眼睛就幾乎是肯定的
They let a creature accurately sense its environment.
眼睛使生物能夠準確地覺察所處的環境
Even the position of the eyes will follow the same rules as on earth.
就連眼睛的位置也會遵循與地球上一樣的規則
Prey animals tend to have eyes on either side of their head,
被捕食類動物的眼睛傾向于長在頭的兩側
allowing them to look out for predators.
使得它們能夠防備食肉動物的襲擊
Predators, even alien ones,
食肉動物，即使是外星食肉動物
need forward-facing eyes to accurately judge distance
也需要前視的眼睛以精確的判斷距離
an essential skill when hunting.
這是捕獵時的一種重要技能
