标签：恐龙 相关文章
Dinosaurs Live Again at an American Museum 恐龙在美国博物馆再生 Many millions of years ago, the last dinosaurs lived in what is now the American West. Now, scientists studying dinosaur fossils have documented what happened to the ancient cr
2014年VOA慢速英语(十二)月
Scientists Are Learning So Much About Dinosaur Nests 科学家深度研究恐龙巢穴 Tons of dinosaur fossils have been unearthed over the last hundred years. These long-buried bones tell us about the physical build and eating habits of dinosaurs.
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(BBC News) American scientists have discovered a fossil of a duck-sized，flightless dinosaur，which was apparently covered in feathers. （英国国家广播公司报道）美国科学家发现了一个鸭子大小的化石，那是一只无法飞行
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Scientists Extract Soft Tissue from 68-Million-Year-Old Dinosaur Bone 科学家从6千8百万年之久的恐龙骨中提取软组织 U.S. scientists have recovered soft tissue from the bones of a near
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Dinosaurs Already Decreasing Before Asteroid Hit 恐龙数量在小行星撞击地球前就已减少分享到: Dinosaursthose big prehistoric creatures may have already been decreasing in population long before an asteroid crashed into the Earth, and
2016年VOA慢速英语(五)月
-If I bring a bone over, we can superimpose these two. It's got one big muscle attachment right here and the dinosaurs have a muscle scar just like this. It appears in the first bipedal dinosaurs, this scar on the outside of the fibula and it is not
探索与发现2012年
With his miniature model of an adult T-rex for reference, along with the growing patterns of close relatives of tyrannosaurs, it's possible to work out the likely proportions of the baby. The starting point for the sculpture is a simple illustration.
探索与发现2012年
the equivalent of a human being with a brain the size of a pea. Lobes for both sight and smell are tiny. Areas controlling information analysis, learning, and complex thought are barely developed. If you look at the size of their brain, you actually
探索与发现2013年
This tactic is still used today on the plains of Africa. If you look at various species of plant eaters, they live together in groups, and if one of them spots a predator, they can whinny or hoot and let the rest of the herd know, so that they can ke
探索与发现2013年
Individually, their huge size is a powerful defense, but sticking together makes these Leviathans almost indestructible. Keeping a herd of 50-ton animals filled up, however, means traveling vast distances, grazing territory covering thousands of squa
探索与发现2013年
populated by millions of odor receptors. Complicated, crazy-straw, tortuous nasal passageway that went from the nostrils, made several loops through the snout before it went down into the throat. Ankylosaurus supersensitive nose can pick up a carnivo
探索与发现2013年
Probably the only way a T-Rex could successfully and safely bring down Triceratops is by having at least one other individual Tyrannosaur that would ambush it from the back while the one in front is keeping the attention of the Triceratops. Working a
探索与发现2013年
Sometimes they even take on members of their own specie in a battle for dominance. Its primary weapon is a pair of a-meter-long horns mounted on its skull. These horns make those of modern creatures look lightweight. A rhinos horn is made of hair, an
探索与发现2013年
solid armor and dangerous weapons all deliver the power to stand up to huge predators. But in the world of Cretaceous, other defenders come equipped with tools not only to survive an attack but to defeat an opponent. Ankylosaurus is a herbivore desig
探索与发现2013年
Interwoven layers can absorb the power of a piercing attack. Ankylosaurus pretty much was not afraid of anything because it would be very difficult to kill this beast. This creatures armor protects something else as well, its eyes. The eyelids of an
探索与发现2013年
19 meters tall and almost 30 meters long. Its neck alone is 4 stories long, a single vertebra almost as tall as a grown man. And a single thighbone weighs over half a ton. They seem to break all of the rules. Theres nothing like them around today. Co
探索与发现2013年
In a prehistoric world, theres a war waging between herbivores and carnivores, and the plant-eaters are winning. They seem to break all of the rules. Theres nothing like them around today. For these plant-eating giants, survival relies on a battery o
探索与发现2013年
Where else would the world's biggest dinosaur live, but in the world's trendiest town? Live may be stretching it a bit. Brachiosaurus brancai has been dead for 150 million years, but he remains impressive, towering more than 13 meters over visitors t
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台湾籍旅美老师今天交给我们的句子是： Many scientists believe that the extinction of dinosaurs was caused by an asteroid the size of a small town crashing into what is now Mexicos Yucatan peninsula. 很多科学家认为恐龙的灭亡
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There are spines, and then theres the Bajadasaurus pronuspinax. During the Cretaceous period, 140 million years ago, this dinosaur spotted a neck of dangerous-looking spines. Argentinian archaeologist Pablo Gallina discovered the unique specimen digg
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