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Because until Argentina scientists had so few facts all they had to go on were their theories,
因為在此之前，科學家們只有很少一些資料能證明他們的假設
but all these theories did have one thing in common:
但是所有這些假設都有一個共同點
they all had something to do with one of the most extraordinary events ever to have happened in the Earth's history,
它們都與地球史上發生過的一次最重大的事件有關
because back at the time of the early dinosaurs, the Earth was a very different place to today.
因為在早期恐龍的時代，地球的面貌與今天截然不同
You see at the beginning of the Jurassic what we had was all the land masses,
在侏羅紀初期，所有陸地板塊
all the continents lumped together in one giant super-continent that was then surrounded by just one giant ocean.
所有大陸都連在一起，形成一塊巨大的超大陸，當時它被一整片泛大洋包圍
This super-continent was the world of the early dinosaurs, but forces deep within the Earth were already at work.
這塊超大陸是早期恐龍的生存地，不過地球內部的巨大力量正在發揮作用
During the Jurassic this continent started to break apart.
這塊大陸于侏羅紀開始分裂
This was the birth of the world we know today.
我們今天熟知的世界誕生了
It was such a huge event, scientists instinctively felt it had to have some effect on the evolution of the dinosaurs.
這是一次重大事件，科學家們從直覺上認為它可能影響到恐龍的進化
Well this break-up of the super-continent probably had to do something with the diversification of the dinosaurs,
這次超大陸的分裂很可能導致了恐龍的多樣化
but what it was that is what we're trying to find out.
但到底是怎么回事，這就是我們要研究的。
