Dinosaurs were reptiles that lived

Dinosaurs were reptiles that lived during a period of earth’s history called the Mesozoic Era, which is also known as the Age of Reptiles. The first dinosaurs appeared more than 200 million years ago. For many millions of years, they dominated the land with their huge size and strength. Then about 65 million years ago, they died out rather suddenly, never to re-emerge.
The word “dinosauras” comes from two Greek words meaning “terrible lizard”. Dinosaurs were not lizards, but their appearance could be truly terrifying. The biggest ones weighed more than ten times as much as a mature elephant and nearly equalled the size of most modern-day whales. The famous kinds of dinosaurs, including the brontosaur and tyrannosaurus rex, reached 80 to 90 feet in length. Not all dinosaurs were giant, however, some were actually not larger than a chicken.
Scientists still do not know what caused dinosaurs to disappear. One theory involves a change of the earth’s climate. It is believed that temperatures dropped significantly towards the end of the Cretaceous protection, it is possible that the climate became too chilly for dinosaurs. In contrast, other species having protection, such as the mammals and birds, were able to survive.

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恐龙是生活在地球历史上称为中生代时期，这也被称为是爬行动物时代期间的爬行动物。第一恐龙出现于 2 亿多年前。很多数百万年来，他们占主导地位的土地以其巨大的规模和实力。然后大约 6500 万多年前，他们为之捐躯相当突然，永远不会重新出现。"Dinosauras"一词来自于两个希腊字，意思"可怕的蜥蜴"。恐龙不是蜥蜴，但它们的外观可能真正可怕。最大的体重超过十倍于作为一只成熟的大象，几乎等于大多数现代鲸鱼的大小。著名种类的恐龙，包括 brontosaur 和霸王龙，达到 80 到 90 英尺长。并不是所有的恐龙都巨大，然而，有一些其实不比一只鸡。科学家仍然不知道是什么导致恐龙消失。一种理论是气候的地球变化。据说，气温大幅下降末白垩纪的保护，它是可能的气候变得太冷了恐龙。相比之下，有保护，如哺乳动物和鸟类，其它物种得以生存。

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恐龙是一种爬行动物，它生活在一个叫做“中生代”的历史时期，这也被称为爬行动物时代。第一批恐龙出现在2亿多年前。数百万年来，他们以巨大的规模和力量控制着土地。大约在6500万年前，他们突然死亡，而不是突然出现的。“dinosauras”来自希腊的两个字的意思是“恐怖的蜥蜴”。恐龙不是蜥蜴，但它们的出现可能是可怕的。最大的体重超过十倍，作为一个成熟的大象几乎等于最现代的鲸的大小。恐龙的著名的种类，包括雷龙和暴龙雷克斯，长度达到80英尺到90英尺。然而，并非所有的恐龙都是巨大的，有些人实际上并不比一只鸡大。科学家仍然不知道什么导致恐龙消失。一个理论涉及到地球气候的变化。据认为，温度下降显着接近结束的白垩纪保护，这是可能的气候变得过于寒冷的恐龙。相比之下，其他物种的保护，如哺乳动物和鸟类，能够生存。