【轻松英文阅读】拯救猛犸象

The woolly mammoth was a very large elephant-like mammal that lived on Earth several thousand years ago. Some mammoths grew to be four meters high and the largest weighed almost nine tons. Both male and female mammoths had very large tusks and walked

科学美国人60秒 SSS Last Woollies Had Mammoth Mutations

Last Woollies Had Mammoth Mutations 长毛象灭绝的真正原因是 In their heyday, woolly mammoths blanketed the Siberian steppe, Alaska and large parts of North America. But by 10,000 years ago, warming climates had turned many of the grasslands

60秒科学:猛犸缘何可以生存于冰期?

A couple million years ago, mammoths migrated north from Africa to colonize Eurasia. Sometime around then a massive ice age kicked inand it was stay warm or die. So their tails and heat-shedding ears shrunk, and they grew thick coats of oily fur. But

Horizon - Life On Mars 火星生命 - 9

The ground here is permafrost, a mixture of soil and ice frozen together. A group of Russian scientists have teamed up with NASA to drill down into it in search of microorganisms. It's work that's bee

SSS 2010-05-04

This is Scientific American's Sixty-Second Science. I'm Christopher Intagliata. Got the minute? A couple million years ago, mammoths migrated north from Africa to colonize Eurasia. Sometime around then a massive ice age kicked inand it was stay warm

SSS 2011-09-20

This is Scientific American's 60-Second Science. I'm Sophie Bushwick. Got a minute? When it came to surviving freezing weather, mammoths relied on more than their woolly coats: even their blood was specially adapted to let them thrive in chilly clime

VOA慢速英语 2008 1104b

VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Bob Doughty. VOICE TWO: And I'm Barbara Klein. This week, we will tell about mammal populations in danger of disappearing. We will also tell about one kind of animal that disappeared

英语听力：探索发现 2012-09-28 长毛象王国 Mammoth—9

This is Alaska today, a wetland of forests, boggy tundra, lakes and rivers rivers that still churn out fresh clues to the Ice Age past. This is a brick-sized tooth, and it belong to a woolly mammoth. Its narrow ridges of enamel tell us more about how

英语听力：探索发现 2012-09-30 长毛象王国 Mammoth—10

The fact that both horses and mammoths were here suggests these forests werent. It seems that, 14,000 years ago, Beringia was a huge expanse of open grassland. This unique habitat of cold, dry grasslands is known as mammoths steppe. But thats not how

英语听力：探索发现 2012-10-03 长毛象王国 Mammoth—11

At its maximum, the ice covered nearly six million square miles. And in places, it was up to two miles thick. The ice blanket was punctuated only by occasional islands of rock, the peaks of the very highest mountains. Though Beringia itself remained

英语听力：探索发现 2012-11-07 美洲大平原 American Serengeti—5

Mud from the ancient riverbanks is good for building nests. lt also holds more evidence that will help us to reconstruct the ice age past. Every now and then,new clues surface, hinting at what else might lie beneath. ln this dried-up pond in South Da

英语听力：探索发现 2012-10-26 长毛象王国 Mammoth—21

The lions will have to try elsewhere. Could a bison be a more realistic prospect? The wind whips up again offering cover, and the hunters focus on a target on the fringes of the herd. Before long the carcass freezes and becomes difficult to eat. Aban

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 2013-01-30 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 2013-02-03 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 2013-02-08 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：2013-03-13 猛玛象进城记 Mammoths to Manhattan—19

Its incredible that so many birds cram into the tiny spaces underneath the bridge. But the battle for living spaces is now an everyday fact of city life. The most populated North American city is New York. Here space is a precious commodity with more

谁杀死了猛犸象？(Who Killed the Elephants?)

Hungry prehistoric hunters, not climate change, drove elephants and wooly mammoths to extinction during the Pleistocene era, new research suggests. 在约一万年前的更新世，大象和猛犸象从

托福阅读备考之长难句分析：史前猛犸

Amid rumors that there were prehistoric mammoths wandering around the unknown region and that somewhere in its wilds was a mountain of rock salt 80 by 45 miles in extent，the two captains set out. (同位语从句rumors that) 当时有一些传言，说