恐龙是怎么灭绝的
As a large family of animals, dinosaurs ruled the world for more than 100000000 years. The Cretaceous from 100000000 4 ten million years ago in the Late Triassic has lived to 6000 millions of years before the end of 5.
我们知道，恐龙灭绝的时间是在距今6500万年前。而且在那个时候，不仅统治了地球达一亿多年的各种恐龙全部绝灭了，同样悲惨的命运还同时降临到了地球上的陆地、海洋和天空中生活的很多种其它的生物。
We know that the time of the extinction of the dinosaurs was 65000000 years ago. And at that time not only ruled the earth up to 100 million years ago, the various kinds of dinosaurs are extinct, just as tragic fate also came to the earth's land, sea and sky in life of many other kinds of biological.
在这次灾难中绝灭的还有蛇颈龙等海洋爬行动物，有翼龙等会飞的爬行动物，有彩蜥等恐龙的陆生爬行动物亲戚，有菊石、箭石等海洋无脊椎动物;至于海洋中的微型浮游动植物，钙质浮游有孔虫和钙质微型浮游植物也几乎被一扫而光。经过这场大劫难，当时地球上大约50%的生物属和几乎75%的生物种从地球上永远地消失了。
In the disaster of extinction and plesiosaur marine reptiles, pterosaurs, and flying reptiles, color sauropod dinosaurs such as terrestrial reptile relatives, ammonites, belemnites and other marine invertebrates; as for miniature planktonic marine animals and plants, calcareous planktonic have wormholes and calcareous micro phytoplankton was almost wiped out. After the disaster, on earth at that time about 50% of the species is almost 75% and disappeared from the earth forever.
这真是一场大绝灭、大灾难。大绝灭的结果使得在距今6500万年这个时间的前后，地球上生物世界的面貌发生了根本性的巨变。这场大绝灭标志着中生代的结束，地球的地质历史从此进入了一个新的时代——新生代。
This is really a big disaster, extinction. The mass extinction of results in the 65 million years ago the time before and after, the biological world outlook on earth occurred fundamental changes. This marks the end of the mass extinction of the Mesozoic, the geologic history of the earth has now entered a new era of the new generation.
科学家们经过不懈的努力，分析研究了到目前为止可以发现的所有线索，提出了解释这一大绝灭现象的各种理论。如小行星撞击理论、最新理论--大规模海底火山爆发、繁殖受挫理论及其证据、气候骤变论、大气成分变化论、免疫缺陷、彗星撞击论等等众多理论，但是至今，关于这场大绝灭的原因仍然没有找到一个百分之百正确的答案。
Scientists through the unremitting efforts and analysis so far can be found all the clues, is proposed to explain the various theories of the extinction phenomenon. Such as asteroid theory, the latest theory - a massive undersea volcanoes outbreak, breeding frustration theory and evidence, on the sudden change of climate, changes in atmospheric composition theory, immunodeficiency, comet impacts on and so on many theories, but so far, about the mass extinction still did not find a 100% correct answers.
1980年在一个科学讨论会上，美国地质学家阿尔瓦雷茨等人根据他们的研究成果，形象生动地宣讲了一段发生在距今6500万年前的惊心动魄的故事：一个阳光灿烂的下午，烈日照耀下的热带灌木林中，许多不同种类和形态的恐龙平静地像往常一样或在湖边漫步，或在水中觅食;在森林的边缘，一只刚刚孵完卵的鸭嘴龙正在蛋巢边来回踱步;在一片开阔的原野上，一只霸王龙正准备扑向一只巨大的三角龙……
In 1980, a scientific discussion, American geologist Alvarez et al. According to the results of their research, image vividly preaching the period occurred in dating back 65 million years ago the thrilling story: a sunny afternoon, sun shining under the tropical shrub, many different kinds and forms of dinosaur calm as usual or walking along the bank of a lake, or in the water foraging; in the edge of the forest, a just hatched after duck billed dinosaur eggs are eggs in the nest while pacing back and forth, in the open field, a King Long Zheng to toward a gigantic Triceratops...
小行星与地球碰撞后产生的撞击力可达1015吨TNT炸药爆炸所产生的能量
The impact of an asteroid with earth after the impact of up to 1015 tons of TNT explosive energy produced by the
突然，一声从来没有听到过的巨响打破了这个宁静的世界。一个直径几公里大的流星猛烈地撞到地球上。这一撞可不得了，相当于几万个原子弹威力的爆炸在顷刻间发生。这是一颗不期而至的小行星，与地球碰撞后产生的撞击力可达1015吨TNT炸药爆炸所产生的能量。
Suddenly, a loud crash that never heard a loud noise broke the quiet world. A few kilometers in diameter meteor crashed fiercely on earth. This hit is allowed to, equivalent to tens of thousands of atomic bomb explosion occurred in an instant. This is a single unexpected asteroid impact after colliding with the earth produced up to 1015 tons of TNT explosion energy.
卷着尘埃的一个巨大的蘑菇云迅速升起，直冲天空，而后弥散开来，最后把整个地球都笼罩在里面。很快，恐龙就彼此看不见了，因为黑云遮天蔽日，白天也没有了阳光。这种恐怖的状况持续了一两年。植物的光合作用中断了，因而大量枯萎、死亡。吃植物的素食恐龙因此相继死去。以后，吃肉的恐龙也由于失去了食物而灭绝了。
Rolled up the dust of a huge mushroom cloud rising fast, straight into the sky, and then dispersed. Finally, the whole earth are enveloped in inside. Soon, they don't see each other, because the cloud day without sunshine sky. This horrible situation lasted one or two years.. The plant's photosynthesis has been disrupted, and so the plant has withered and died.. Eat vegetarian vegetarian diet and thus died. Later, the meat of the dinosaur also because of the loss of food and the extinction of the.
