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The humble seed spreads life across the planet.
不起眼的種子在地球散播生命，
And each tree and plant pumps out even more oxygen.
這些樹與植物釋放出更多氧。
It's an environment very much like today.
這種環境與今天非常相像。
The planet has come a long way,
我們有長足的進步，
from a lump of burning rock and dust,
從一團燃燒的巖石灰塵，
to a blue and green world bursting with life.
到生機盎然的藍綠色行星，
There are now fish, plants, and this, the dragonfly.
這里有魚，有植物，還有這個，這是蜻蜓。
It's called Meganeura.
這種龐然大物叫做巨蜻蜓。
This insect is the size of an eagle.
跟老鷹一樣大的蜻蜓，
What were once legs have evolved into wings,
曾經的腿已經進化成翅膀，
extending the dragonfly's hunting territory over a vast area.
大幅擴展蜻蜓的狩獵范圍
There are also millipedes, and spiders down there.
這里還有馬陸、蜘蛛。
These creatures, called arthropods, were among the first to set foot on land hundreds of millions of years ago.
這些節肢動物率先踏上陸地，他們已經存在數億年，
They look almost identical to the bugs that invade our homes today.
他們看起來幾乎就像現在入侵我們宅院的蟲子。
