被点亮的星球（2018）

One Strange Rock S01E06

Part 5 May 18, 2021, 1:20 p.m.

No need for goggles or oxygen tanks,
无需泳镜和氧气筒
their bodies have learned to do without them.
他们的身体学会了只身下海捕鱼
The differences go deeper.
至于更深层次的区别
As children, the lenses in their eyes adapt
小时候他们的晶状体适应了水下环境
so their underwater vision is twice as sharp as ours.
所以他们的水下视力是常人的两倍
Pretty handy when you're hunting.
可谓是捕鱼的利器
In the short term, humans can adjust.
短期内人类会自我调整
In the long term...
长♥期♥的话
We evolve.
人类会进化
Maybe there is a Goldilocks planet out there, another Earth
或许确实存在第二个宜居的地球
If so, we'll be spending lifetimes getting there.
如果真是如此我们将费尽心血只为前往那里
What might happen to generations born in space?
太空里出生的后代会怎么样呢
One of the ways to test that is
其中一个测试方法是
to take life forms from Earth that have a very rapid life cycle
将生命周期极短的地球生物
and take them up to the space station
带到太空站
and see how they develop.
以此观察它们的成长
Jellyfish have small sensors, like hairs.
水母的传感器非常小像头发丝
And that lets them know about gravity and which way's up.
使它们感受重力和上升方向
Sort of like the balance system we have in our inner ear.
有点像人类内耳的平衡系统
When we took jellyfish to the space station,
水母到达太空站后
they did not develop normally.
它们的生长情况有所不同
When they came back to Earth,
当它们回到地球
the ones born in space couldn't tell which way was up.
在太空繁殖的水母不知道上升的方向
It's a sobering thought,
这个实验发人深省
getting to a new home
星际移♥民♥
might change us in ways we can't predict.
或许会以难以预期的方式改变人类
I'm confident that no matter what is thrown at us
我坚信在这段奇妙的星际旅行中
during this incredible journey,
不管人类进化成什么
we'll find a way to survive.
我们总会活下来的
But there is a cost.
只是需要付出代价
What we think of as us,
我们眼中的自己
can only exist here.
只能存在于地球
We will no longer be earthlings when we get there.
离开了地球我们便不再是地球人
We will be become aliens.
我们会成为外星人
Sometimes you can only really see something from a distance.
有时候有些东西只能从远处眺望
No one ever got homesick staying at home.
只有离开家乡才会明白何为乡愁
Earth has been our constant companion.
地球是人类的忠实伙伴
There when the first cell flickered to life,
地球是第一个细胞演变成生命的地方
here now as we turn to the stars.
如今我们的征途是遥遥星辰
She's in our bones.
地球已经深入骨髓
And in our guts and in our minds.
它是我们的内在与思想
We may one day venture out from our strange rock.
或许某天人类会为了探险星际而远离我们的神秘星球
But we'll never get the Rock out of us.
但我们永远不会抛弃地球
Next time.
下一集
How our paradise planet was made by life.
生命如何塑造出我们的天堂星球