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New research shall suggest that dinosaurs were on their way to extinction millions of years before meteor impact which is widely believed to have wiped them out. Dr Chris Venditti is one of the authors of the new research. He says dinosaurs began to lose their supremacy in the evolutionary chain. There was some competition for resources and these dinosaurs weren't winning. They weren't able to survive in their environment anymore and thus went extinct. And the opportunity didn't seem to be there for other species to lead to new species themselves. So again, the combination of those two things led to the decline.

　　人们普遍认为恐龙是因陨石撞击灭绝，但据最新研究表明，早在发生撞击的数百万年前，恐龙就已濒临灭绝。克里斯·文迪蒂博士为该研究作者之一。他称恐龙早已失去进化优势。各物种曾为争夺资源互相竞争，但恐龙不是最后赢家。它们已无法适应现存环境，并走上灭绝道路。对于其它物种，进化新物种似乎也无可能。考虑到以上两种因素，最终导致恐龙灭绝。

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