研究鸵鸟有助于了解恐龙的行动特征(有声)

Ostrich wings, in addition to use in display and thermoregulation, let the giant birds make subtle, quick movements. Which could help researchers better understand the behavior of bipedal dinosaurs Sometimes it seems theres only so much we can learn

英语听力：自然百科 恐龙杀手

Scientists have confirmed for the first time that Australia was once home to a theropod dinosaur that was big, fast and terrifying, not unlike the Velociraptor featured in the movie Jurassic Park. It was an 1,100 pound meat-eating predator with three

英语听力：探索发现 2012-05-23 恐龙是怎样的炼成的—2

Here in Crystal Palace in south London, you can still see the first dinosaur exhibition that was ever built anywhere in the world. The sculptures were unveiled in 1854. It was the start of an obsession that weve never got over. But it wasnt long befo

英语听力：探索发现 2012-05-25 恐龙是怎样的炼成的—3

So beyond the fact that the exhibition is obviously about dinosaurs, what's the idea behind it? It's really how do we know what we know about dinosaurs. So you are not just presenting facts to people, you are actually showing how you've got to that k

英语听力：探索发现 2012-05-27 恐龙是怎样的炼成的—4

I think when most of us go into an exhibition like this, we don't think about all of the work thats gone into it, and an exhibition of this scale requires hundreds of people whore working together, from scientists to engineers to artists and designer

英语听力：探索发现 2012-05-30 恐龙是怎样的炼成的—5

Amazingly less than 100 meters away, there are more clues to the past. Luis colleague has found the remains of a sauropod. Theres a piece of rib here thats going into the ground about this angle. And then theres a piece of the pubis, the hip bone rig

英语听力：探索发现 2012-06-01 恐龙是怎样的炼成的—6

Working out what species this is wont be possible until the bones are back in L.A., but fossils are fragile and moving them is a risky business. Ready? One, two, three, move. It has to be 400 pounds at least, right, if no more. Go slowly. The team be

英语听力：探索发现 2012-06-03 恐龙是怎样的炼成的—7

Darren, I do love these museum collections when you come behind the scenes and you suddenly feel that you are surrounded by treasures. And it's amazing to think that there are new discoveries to be made in here as well. That's right in a way. There a

英语听力：探索发现 2012-06-06 恐龙是怎样的炼成的—8

Back in Los Angeles, Luiss team are working on the bones that were dug up in Utah. The next step in turning them into an exhibition is to work out exactly what they are. And this is where the fossil bones end up, and here the preparateurs continue th

英语听力：探索发现 2012-06-10 恐龙是怎样的炼成的—10

Fossilized bones are essentially solid lumps of rock, which means that mounting them into a skeleton is an enormous challenge. Most of the bones are real, which makes them extremely heavy. Were estimating at the total weight of the bones. Its a littl

英语听力：探索发现 2012-06-17 恐龙是怎样的炼成的—13

-Can I touch them?-Yeah. -Will they peck me? -Theyll peck at your rings. -They really? -And theyll try to take them off if theyre gonna get hold. But they are not very strong at pecking. -I want to feel your feathers. Now this might be what a dinosau

英语听力：探索发现 2012-06-27 恐龙是怎样的炼成的—17

The questions about Louis's baby T-rex run even deeper than its appearance. With such limited fossils, some scientists have actually questioned whether the bones might belong to a different species of dinosaur entirely, something like a T-rex, but mu

英语听力：探索发现 2012-07-06 恐龙是怎样的炼成的—21

With large teeth for mashing plants and sharper teeth for eating insects and worms, we can even tell that fruitadens was an omnivore. But the final piece of the puzzle in recreating this animal is its colour. And that's something we can't be sure abo

英语听力：探索发现 2012-07-08 恐龙是怎样的炼成的—22

Going back, say, ten years ago, would you ever imagine that you would have been able to tell what colour any dinosaurs would have been? No, I mean I think at that time I would have said that its one of the things we will never know. And so we just fo

英语听力：探索发现 2012-07-11 恐龙是怎样的炼成的—23

For those few dinosaurs from whom fossilized feathers had been found, largely in China, we can now put the finishing touches to our construction. So has this changed the way that artists are painting their reconstructions? I mean you often see some d

英语听力：探索发现 2012-07-13 恐龙是怎样的炼成的—24

Back in Los Angeles, last-minute preparations are under way to get the dinosaurs ready for the public. It's only now that you get a sense of just how many people have been involved in creating this exhibition, from the artists to the designers, to th

英语听力：2013-07-12 《恐龙的战争》3 顽强防御—12

...plant material at a time, and were talking about something huge. Surprisingly, it isnt something huge which allows these giant herbivores to grow big enough to be all but invincible. In fact, its something incredibly small, and something meat eate

英语听力：2013-07-05 《恐龙的战争》3 顽强防御—9

The tip is designed not the split on impact. It absorbs the stress of all that raw power the hammer gives because its not solid bone. Instead, its honeycombed with soft tissue, marrow, blood and fact. Ankylosaurus combines steel-like protective plate

英语听力：2013-06-19 《恐龙的战争》3 顽强防御—2

These plant eaters are no pushovers. They are no theyre no pansies. We have records, quite a few, of adult dinosaurian predators being killed by herbivores. It did happen. It happens today. Lions get kicked in the face and die from a single blow from

英语听力：2013-06-26 《恐龙的战争》3 顽强防御—5

Here we have one of the greatest predators nature has ever produced and one of the greatest defenders nature has ever produced sparring of with some truly awesome weaponry. Theres nothing like that in the world today. Triceratops most effective defen