英语听力：探索发现 2012-12-19 冰河新新州 Ice Age Oasis—3

This creates steam in oasis and a profusion of life. Today, these warm springs are a refuge for one of Florida's most tropical inhabitants. The West Indian Manatee wasn't present during the last ice age, but returned here as the waters warmed up. Eve

英语听力：探索发现 2012-12-12 美洲大平原 American Serengeti—20

This trail leads to the cave and the freshly dead bison, just out of reach. Hunger makes the bear risk everything. He falls and joins the bison in its tomb. Now he can eat his fill. but after that there's no way out. ln time he'll be just one more ic

英语听力：探索发现 2012-12-02 美洲大平原 American Serengeti—16

So let's go back in time, back 13,000 years to relive one day in the life of North America's great ice age plains. It's early morning at the end of a long, hot summer. Even major rivers are beginning to run low. Colombian mammoth herd follows the riv

英语听力：探索发现 2012-12-07 美洲大平原 American Serengeti—18

The scene is set for a daily ice age drama. Only the very largest are safe now. Patience is the key, the lionesses close in, waiting for their opportunity. The first charge causes chaos, but this is just what the lions want. ln the melee, they've alr

英语听力：探索发现 2013-01-18 冰河新新州 Ice Age Oasis—16

This triggered other dramatic changes. As sea levels dropped, so did the inland water tables. Florida's fresh water drained away through the porous limestone rock. Pools dried up and springs diminished. Florida was on the brink of drought. And animal

英语听力：探索发现 2012-08-29 爱尔兰的故事 Story Of Ireland—20

The Vikings who would eventually descend on Ireland had their ancestral roots here in Norway. From these fjords, they created a maritime empire that stretched from the shores of America in the west to central Russia in the east. The Viking world of t

英语听力：探索发现 2012-08-26 爱尔兰的故事 Story Of Ireland—19

In 795, monks on an island near Dublin saw a fleet of ships approaching. The long ships with a dragons head carved on the bow carried a force of warriors who would plunder the treasures accumulated by the monastery over 2 centuries. A monk wrote late

英语听力：探索发现 2012-09-07 爱尔兰的故事 Story Of Ireland—24

On Good Friday 1014, the opposing forces faced each other at Clontarf, outside Dublin. There were two Irish armies, but both with their Viking allies. Of these Vikings it was said they carried arrows anointed and browned in the blood of dragons. The

英语听力：探索发现 2012-11-16 美洲大平原 American Serengeti—9

Bison calves are born in summer and can run within a few hours of their birth. They have no choice. The herd won't wait in its eternal quest to find new grazing. Smaller grazers are still found here, too. But they stay put instead of wandering the pl

英语听力：探索发现 2012-11-18 美洲大平原 American Serengeti—10

Colombian mammoths had to feed almost round the clock to fuel their bulky bodies. But as the ice age ended, food was not the mammoths' biggest problem. A new and deadly predator began to infiltrate the plains, a match for any prey, even the mighty ma

英语听力：探索发现 2014-06-08 BBC 地平线：陨石的真相-12

But there is a downside to Jupiter. It can also deflect asteroids into orbits that cross the Earths path. The Chelyabinsk meteor appears to be one of these typical Earth-crossing events. The likelihood is that it was thrown out of its regular orbit b

英语听力：探索发现 2014-03-07 America's Sex Pioneers 美国的性爱先锋-18

These prostitutes found themselves extraordinary wealthy off in a short period of time. In fact, one story of a prostitute who claimed she made 50000 dollars in a period just a few months, which is much more served than the gold miners making. Oftent

英语听力：探索发现 2014-02-07 America's Sex Pioneers 美国的性爱先锋-6

-Over time, what he created, the idea of utopian experience, actually became as equal part of the funding of what we come to think as America as the Puritans' work. And much of the sexual revolution does, in fact, owe a great debt to that 1840 Maypol

英语听力：探索发现 2014-01-29 America's Sex Pioneers 美国的性爱先锋-3

And whereas our ** of adore were prohibited, getting busy and private was mandatory. -It was written into the Puritan Bible that a man has duty to God and to his wife was to pleasure her. That was called due benevolence. -It's also about economy and

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 2013-02-01 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 2013-02-03 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 2013-02-06 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 2013-02-13 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 2013-02-17 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