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But it was nothing like the atmosphere we know today.
不過這一點不像我們今天熟知的大氣層
This was a witches' brew of carbon dioxide, methane and steam
這是二氧化碳，甲烷和有毒的硫化氫蒸汽
laced with poisonous hydrogen sulphide.
聚合在一起
There was no sign of the gas we humans depend upon, oxygen.
這里面沒有人類賴以生存的氧氣
This lethal mix was to endure for something like two billion years
這些致命的混合物孕育某些東西長達二十億年
until primitive life began to transform the atmosphere.
直到某些意料之外的事物開始改變大氣層
The sea here is full of life,
這里的大海里全是生物
but these creatures aren't what I've come for.
但這些生物不是我來此的目的
It's these curious lumps I'm interested in.
這些奇怪的塊狀物才是我感興趣的
They're important because every single plant and animal,
他們很重要，因為每一個單獨的動植物
in fact, every single person on the planet,
實際上，地球上每個人
owes their existence to them.
和它們都有聯系
These bizarre blobs
這些奇異的小圓塊
Look Like boulders washed up on the foreshore but they're not.
就像海灘上被沖刷的大圓石實際上并非如此
They're actually alive.
它們是活著的
These lumps are one of the earliest forms of life on Earth.
這些塊狀物是地球上最早的物種之一
They're called stromatolites.
叫做疊層石
