評論
打印
Back at base, Oiver studied the most complete fossil he had from before the super-continent split up.
回到基地，Oiver開始研究他找到的最完整的大陸分裂前的骨骼
If the vicariance theory was right
如果地理分隔假說是正確的
then it should look very similar to its relatives in the Northern Hemisphere.
那么它必然與北半球的近親非常相似
It is a medium sized meat-eating dinosaur which,
它是中等體型的食肉恐龍
which still means that of course for our modern standards this would be a pretty enormous beast.
按照現在的標準來看，它仍然是龐然大物
The total length would probably be something like around five metres
它的腿骨全長大約有5米
which is two times the length of the modern tiger which is the largest land predator that we have.
比當今最大的掠食動物--老虎還要長2倍
We know that animals of more or less this size move at something like 40km/h.
我們知道類似這種體型的恐龍奔跑速度大概是40公里/小時
It probably looked very much like the familiar allosaurus of North America.
它非常像我們熟悉的北美洲異特龍
The Argentinean dinosaur was an early ancestor of the predators that went on to dominant the late Jurassic,
阿根廷的恐龍是后來稱霸晚侏羅世的掠食恐龍的先祖
but the crucial thing was that it was virtually identical to dinosaurs in the Northern Hemisphere
最關鍵的是，它實質上與北半球的恐龍是一樣的
and this could only be the case if the dinosaurs were able to migrate freely between north and south.
唯一的可能就是當時南北方的恐龍能自由遷徙。
