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It's been fifty million years since virtually all life on Earth was wiped out.
地球生物滅絕已有5000萬年，
And the planet has been transformed.
這個行星已改頭換面，
It's now 200 million years ago, and just one supercontinent, Pangea, stretches from pole to pole.
時間是2億年前，只有一塊名為盤古大陸的超大陸，從地球的一極延伸到另一極。
After the trauma of the mass extinction, the planet heals.
大滅絕后地球開始療傷，
Temperatures stabilize; the acid rain neutralizes and vegetation returns.
氣溫逐漸穩(wěn)定，酸雨中和，植物重?zé)ㄉ鷻C(jī)。
With 95 per cent of all life on Earth wiped out, the field opens for a new species to emerge.
地球上95的生命都已滅絕，新的物種開始出現(xiàn)。
One that will dominate the planet like no other. The dinosaurs.
有一個物種將空前絕后地統(tǒng)治地球－－恐龍
These are called Ammosaurs. Like all dinos, they evolved from the reptiles that survived the Permian Extinction.
這是砂龍，一如所有恐龍，它們都是演化自熬過二疊紀(jì)大滅絕的少數(shù)爬蟲類。
At 15 feet tall, their size makes them slow, and vulnerable.
它們高4.5公尺，行動緩慢，且易受攻擊。
Nearby is the dilophosaurus.
一只雙脊龍，
It's small, and fast.
它們既小且快。
