英语听力：探索发现 2012-05-20 恐龙是怎样的炼成的—1

Dinosaurs. Youve probably seen hundreds of them. You might think you know what they look like. But almost every dinosaur youve ever seen is a work of fiction. You turn on the television. it almost feels that we know everything about them. And thats n

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 2012-06-20 恐龙是怎样的炼成的—14

-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

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 2012-06-08 恐龙是怎样的炼成的—9

You know, they are fairly kind of flat pieces of bones, so I would think maybe this is part of the skull of a jaw. Am I anywhere near? Yes, yes, you are absolutely right. So what you have here are two lower jaws of a dug-out dinosaur. Oh, brilliant,

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 2012-06-13 恐龙是怎样的炼成的—11

The pose in which the dinosaur is hung while being true to science will also involve a degree of artistic interpretation to really bring the exhibit to life. A little bit more of a side way within it. (Ok.) Because its a little too flat. Its not movi

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 2012-06-22 恐龙是怎样的炼成的—15

But even working out exactly what an adult T-rex would have looked like only gives you a snapshot of a moment in time. To really understand this animal, we need to know how it changed over the course of its entire life. And that's why Luis's team are

英语听力：探索发现 2012-06-24 恐龙是怎样的炼成的—16

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.

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 2012-06-29 恐龙是怎样的炼成的—18

But its not completely finished. Paul and his team need Luis advice on a couple of issues. There are several unknowns. And a complete tail has never been found. So on the older drawings that we have, theres maybe 53 tailbones but the newer thinking i

英语听力：探索发现 2012-07-01 恐龙是怎样的炼成的—19

Oh, this is a bit different. Therere dinosaurs here. Now these guys I recognized. (Yes.) So this is your famous Thomas? (Yes.) Can we get up here? (Sure. Absolutely.) Face to face to the baby T-rex. With three T-rexes of different ages on one platfor

英语听力：探索发现 2012-07-04 恐龙是怎样的炼成的—20

So how realistic do you think it is to show 3 tyrannosaurs coming together like this? We have evidence suggesting that these animals lived in groups. Its very reasonable to imagine a scene like this in which you have a juvenile eating a carcass of a

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