恐龍是怎么滅絕的

作為一個(gè)大的動(dòng)物家族，恐龍統(tǒng)治了世界長(zhǎng)達(dá)1億多年。從1億4千萬年前的三疊紀(jì)晚期一直生活到6千5百萬年前的白堊紀(jì)之末。

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.

我們知道，恐龍滅絕的時(shí)間是在距今6500萬年前。而且在那個(gè)時(shí)候，不僅統(tǒng)治了地球達(dá)一億多年的各種恐龍全部絕滅了，同樣悲慘的命運(yùn)還同時(shí)降臨到了地球上的陸地、海洋和天空中生活的很多種其它的生物。

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.

在這次災(zāi)難中絕滅的還有蛇頸龍等海洋爬行動(dòng)物，有翼龍等會(huì)飛的爬行動(dòng)物，有彩蜥等恐龍的陸生爬行動(dòng)物親戚，有菊石、箭石等海洋無脊椎動(dòng)物;至于海洋中的微型浮游動(dòng)植物，鈣質(zhì)浮游有孔蟲和鈣質(zhì)微型浮游植物也幾乎被一掃而光。經(jīng)過這場(chǎng)大劫難，當(dāng)時(shí)地球上大約50%的生物屬和幾乎75%的生物種從地球上永遠(yuǎn)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.

這真是一場(chǎng)大絕滅、大災(zāi)難。大絕滅的結(jié)果使得在距今6500萬年這個(gè)時(shí)間的前后，地球上生物世界的面貌發(fā)生了根本性的巨變。這場(chǎng)大絕滅標(biāo)志著中生代的結(jié)束，地球的地質(zhì)歷史從此進(jìn)入了一個(gè)新的時(shí)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.

科學(xué)家們經(jīng)過不懈的努力，分析研究了到目前為止可以發(fā)現(xiàn)的所有線索，提出了解釋這一大絕滅現(xiàn)象的各種理論。如小行星撞擊理論、最新理論--大規(guī)模海底火山爆發(fā)、繁殖受挫理論及其證據(jù)、氣候驟變論、大氣成分變化論、免疫缺陷、彗星撞擊論等等眾多理論，但是至今，關(guān)于這場(chǎng)大絕滅的原因仍然沒有找到一個(gè)百分之百正確的答案。

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年在一個(gè)科學(xué)討論會(huì)上，美國(guó)地質(zhì)學(xué)家阿爾瓦雷茨等人根據(jù)他們的研究成果，形象生動(dòng)地宣講了一段發(fā)生在距今6500萬年前的驚心動(dòng)魄的故事：一個(gè)陽光燦爛的下午，烈日照耀下的熱帶灌木林中，許多不同種類和形態(tài)的恐龍平靜地像往常一樣或在湖邊漫步，或在水中覓食;在森林的邊緣，一只剛剛孵完卵的鴨嘴龍正在蛋巢邊來回踱步;在一片開闊的原野上，一只霸王龍正準(zhǔn)備撲向一只巨大的三角龍……

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...

小行星與地球碰撞后產(chǎn)生的撞擊力可達(dá)1015噸TNT炸藥爆炸所產(chǎn)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，一聲從來沒有聽到過的巨響打破了這個(gè)寧靜的世界。一個(gè)直徑幾公里大的流星猛烈地撞到地球上。這一撞可不得了，相當(dāng)于幾萬個(gè)原子彈威力的爆炸在頃刻間發(fā)生。這是一顆不期而至的小行星，與地球碰撞后產(chǎn)生的撞擊力可達(dá)1015噸TNT炸藥爆炸所產(chǎn)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.

卷著塵埃的一個(gè)巨大的蘑菇云迅速升起，直沖天空，而后彌散開來，最后把整個(gè)地球都籠罩在里面。很快，恐龍就彼此看不見了，因?yàn)楹谠普谔毂稳?，白天也沒有了陽光。這種恐怖的狀況持續(xù)了一兩年。植物的光合作用中斷了，因而大量枯萎、死亡。吃植物的素食恐龍因此相繼死去。以后，吃肉的恐龍也由于失去了食物而滅絕了。

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.