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谁使恐龙灭绝 恐龙兴起于2.3亿年前，曾横行地球1.6亿年之久，然而却在6500万年前倏然消失了。 许多年来，科学家们就导致恐龙灭绝的原因展开激烈的争辩。有人认为是某种病毒造成了它们的消亡；有人认为是小哺乳动物吃光了所有的恐龙蛋，使之后代无法延续；有人认为恐龙
Who caused the extinction of dinosaurs? The dinosaurs rose 230 million years ago and once struck the earth for 160 million years. However, they disappeared 65 million years ago. For many years, scientists have fiercely debated the causes of the extinction of dinosaurs. Some people think that it was a certain virus that caused their demise; some people think that it was a small mammal that ate all the eggs of dinosaurs so that their descendants could not continue; some people think that dinosaurs