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Something turned the primitive dinosaurs of the early Jurassic
因為某些原因，早侏羅世的原始恐龍
into the amazing creatures of the late Jurassic, but what was it?
最終變成了晚侏羅世那些令人稱奇的生物，那么，究竟是什么原因呢
Finding the roots of these giants is actually quite a complicated thing to do.
尋找這些巨獸的根源是一件很復雜的事
In fact, finding their roots has been sort of something
事實上，尋找它們根源這種事
which palaeontologists have been trying to do for the last 200 years. It's a big problem.
過去200年來一直都有古生物學家在嘗試。這是很困難的事
All scientists knew was that whatever had transformed the dinosaurs
所有科學家都知道使恐龍發生改變的事件
it happened in the 40 million years of the mid-Jurassic, but mid-Jurassic fossils are very rare.
發生在4億年前的中侏羅世，可是中侏羅世的化石非常匱乏
The frustrating thing is with the middle Jurassic the curtains have been drawn
讓人感到沮喪的是，中侏羅世好像不肯揭開它的神秘面紗
so whatever happened there has been almost hidden from view.
所以那時發生了什么幾乎無從得知
For decades, scientists hoped to find a site that would unlock the secrets of this palaeontological black hole.
幾十年來，科學家們一直希望找到一處地點，能解開這個古生物學黑洞的秘密
It would have to be something very special.
那里必須有一些很特別的東西
What would be ideal is for us to find a site in the middle Jurassic
最理想的情況是我們能找到中侏羅世的化石場
that not only had dinosaur fossils, but had a wealth of dinosaur fossils.
不僅有恐龍化石，而且要有大量的恐龍化石
Enough of, of an animal to not only reconstruct it
要有足夠多的動物，不僅能推想當時的場景
but have maybe several of that animal so you know you're right in your interpretation.
而且可能有些動物會使你覺得你的解釋是對的
