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When they looked further, there were clear signs that the fish had been killed by a volcanic eruption,
他們繼續(xù)搜尋后發(fā)現(xiàn)，一些顯著跡象表明這些魚的確死于火山爆發(fā)
but then the evidence became more confusing.
可是后來的證據(jù)開始變得模棱兩可
When Oliver's team looked on land they found nothing,
當Oliver的小組研究陸地狀況時，他們一無所獲
no sign of an extinction event affecting the dinosaurs.
沒有證據(jù)表明滅絕事件影響了恐龍
Whatever had killed the fish and caused the mass extinction in the oceans, it hadn't affected life on land.
不管是什么殺死了魚，并導(dǎo)致海洋中的大滅絕，它并沒有影響到陸地生物
That meant dinosaur evolution couldn't have been kick-started by a mass extinction. That theory was wrong.
也就是說恐龍的進化并非由大滅絕引爆，這種假設(shè)是錯誤的
It meant scientists would have to find something else,
這意味著科學家們必須找出其它原因
something equally connected to the break-up of the super-continent
超大陸的分裂還關(guān)系到另一事件
and powerful enough to have transformed the evolution of the dinosaurs,
它的強大作用也足以改變恐龍的進化歷程
so they turned to another theory: climate change.
因此他們開始關(guān)注另一種觀點：氣候變化。
