英语听力：探索发现 2013-02-17 猛玛象进城记 Mammoths to Manhattan—9

By the mid 1800s, the horse and the cowboy had come to symbolize the wild west. And of course, with the cowboys came cattle. As the bison quickly vanished from the landscape, cattle filled their place. Meanwhile increasing numbers of the tame horses

英语听力：探索发现 2013-02-15 猛玛象进城记 Mammoths to Manhattan—8

Just over 500 years ago, Europeans arrived in North America. And with these colonizers came an animal that hadnt been seen here for thousands of years. The horse returned to the Americas, now tamed and carrying the Spanish conquistadors. This new for

英语听力：探索发现 2013-02-13 猛玛象进城记 Mammoths to Manhattan—7

...and may trace their ancestry all the way back to the first dogs to enter North America. The Carolina dogs are pack animals with a strick hierarchy topped by an alpha male. Like most wild dogs, they hunt in groups. But many of the kills they make a

英语听力：探索发现 2013-02-08 猛玛象进城记 Mammoths to Manhattan—5

But there is a problem with the idea that hunting caused the mass extinction. Mammoths were not the only animals to disappear. Camels survived for millions of years in North America, but disappeared around the same time as the mammoths. Wild horses f

英语听力：探索发现 2013-02-06 猛玛象进城记 Mammoths to Manhattan—4

The same signs appear in young male mammoth tusks, but those living in North America at the end of Ice Age laid down their stress rings three years earlier than usual. In other words, it seems that young males were leaving the herd at an earlier age.

英语听力：探索发现 2013-02-03 猛玛象进城记 Mammoths to Manhattan—3

But even on its own, a mammoth was still highly dangerous and an attack required stealth and teamwork. One of the hunters may have acted as a decoy, distracting the animal while others surrounded it. These hunters had another trick up their sleeve. U

英语听力：探索发现 2013-02-01 猛玛象进城记 Mammoths to Manhattan—2

To find the answers, we need to rewind history around 14,000 years to a time when the first people set foot in North America. The continent was about to undergo a profound change, a change these new arrivals may have played a part in. Throughout the

英语听力：探索发现 2013-01-30 猛玛象进城记 Mammoths to Manhattan—1

Downtown L.A., the ultimate modern American city, but Los Angeles skyscrapers are built over the graves of thousands of extinct Ice Age beasts. Today all we have are memorials to these vanished animals, but imagine if they had survived into the prese

英语听力：探索发现 2013-01-27 冰河新新州 Ice Age Oasis—20

Though very powerful, shes not a sprinter and she needs to get close to her prey before she strikes. This time shes run too soon and its a fruitless chase. Then her attention is diverted to a slower-moving target, slow but not defenseless. She backs

英语听力：探索发现 2013-02-10 猛玛象进城记 Mammoths to Manhattan—6

Saber-tooth died out, but another big cat survived. The puma may have been more able to adapt because its diet is more varied and includes small prey. The grizzly bear also lived through the post Ice Age changes and now thrives in North America. Once

英语听力：探索发现 2013-01-25 冰河新新州 Ice Age Oasis—19

In the heat of the day, hunters can afford to slow down and rest in the shade. Its one of the advantages of a high-protein diet. Llamas originated here in North America are the regular visitors to the spring. The strange-looking tapir is common too.

英语听力：2013-08-30 《流言终结者》 第11季 第8集 完全爆炸手册—13

Lets say movies always get wrong? No. We were able to blow up a safe using water and a charge. And it is possible these liquid nitrogen just slow down a battery chain of explosions. Nice! For the most part movies just get real, because even without s

英语听力：2013-09-13 《流言终结者》 第11季 第8集 完全爆炸手册—19

And the way its density differs from air (Everythings in. It looks great.) has led to many a lagoon boom. 50 pounds of ANFO in three, two, one, bye-bye. But whats Gregs other reason for loving this liquid? The second reason is that explosions on high

英语听力：2013-09-11 《流言终结者》 第11季 第8集 完全爆炸手册—18

Now for a completely gratuitous explosion underground. In three, two, one. Well, that was a nice little thud. B was for bomb range. A was for audit. N was for nothing. (Fire!) And G was for grenade. Put them together and what do you get? (Fire!) And

英语听力：2013-09-08 《流言终结者》 第11季 第8集 完全爆炸手册—17

Now the kitchen isnt the only dangerous place here on Mythbusters. The bathroom can be just as danergous. Why? Because you never know when a toilet might explode. With an unsavory subject matter (This ought to clean out the pipes.) Lets not hang arou

英语听力：2013-09-06 《流言终结者》 第11季 第8集 完全爆炸手册—16

Gregs right. These rockets had power-of-plenty. Good. Its on the hook moving well. But with that power came no responsibility. Or not. So we built a big rolling bomb instead of a rocket. Could we get our money back? I think someone owes me 10,000 buc

英语听力：2013-09-01 《流言终结者》 第11季 第8集 完全爆炸手册—14

Most of the time I say a bomb tech has the best job in the world. But when nothing happens, thats really when they earn their pay. Looks like thats my problem. Next, its over to Grant. One of the key parts of mythbusting is data. Im totally psyched a

英语听力：2013-08-28 《流言终结者》 第11季 第8集 完全爆炸手册—12

So we are going to do a little test. Were going to turn on the lawn mower and use this DB meter to find out exactly how loud it is. Then were gonna get a pound of C4, put the lawn mower on top of it, blow it up and find out how loud the boom is. Beca

英语听力：2013-08-25 《流言终结者》 第11季 第8集 完全爆炸手册—11

My name is J.D. Nelson and Ive been a sergeant for Alameda county sheriffs bomb squad for 12 years, as well as doing some crazy things for Mythbusters. I spent most of my time dealing with real life explosive situations. If there is a suspicious pack

英语听力：2013-08-23 《流言终结者》 第11季 第8集 完全爆炸手册—10

Its the Mythbusters A to Z of explosions. And following H for high-speed, I is for implants? You know, when I get the memo that we are going to be revisiting implants, this is the last thing I have pictures. Yeah, me too. But you know, were here to r