英语听力：自然百科 阿根廷的化石天堂

In the shadow of the Cerro Condor, a 600-meter-high limestone bluff in Patagonia, signs of life are few. But this wind-swept valley in Chubut province of Argentina is becoming one of the world's leading sites for paleontologists. Recent find showed t

英语听力：自然百科 2008机器人巡礼

Humanize robots may once have been a figment of the imagination, but 2008 saw several robots bringing the concept a step closer to reality. In July, London Science Museum was the venue for the debut of some futuristic robots. figment:虚构的东西

英语听力：自然百科 Iceland Puffin Threatened 冰岛海雀

On a sunny summer day, Iceland's Westman Islands seem a vision of serenity. But despite the placid appearance, this is in fact one of the most volatile places on earth: volcanic activity runs rampant in Iceland; earthquakes and eruptions occur freque

英语听力：自然百科 Ancient Sea Life in Utah 探秘古犹他州

Perhaps at first glance, you wouldnt expect to find evidence of marine animals in the area of deserts and canyons in southern Utah. But a team of paleontologists believe its the perfect spot. Led by National Geographic grantee Barry AlBright, they ar

英语听力：自然百科 佛罗里达州的温泉（二）

The divers started in the ocean, but they are now within solid bedrock, 150 feet beneath someone's living room. They are now swimming in the water supply for the town above. Here they find, as they had hoped, life in the pitch darkness. These are hyd

英语听力：自然百科 佛罗里达州的温泉（一）

Why does Florida have so many springs? Florida sits on a layer of porous limestone which acts as an underground reservoir or aquifer. This aquifer can absorb huge amounts of water. Where the pressure is great enough, springs bubble up, spewing up bil

英语听力：自然百科 撒哈拉的史前鳄鱼化石

A National Geographic researcher and his team have uncovered fossilized remains of 5 ancient crocodile species that lived among dinosaurs some 100 million years ago. One of the crocs had an oversized set of canines, and another had a snout like a duc

英语听力：自然百科 保护马蹄蟹（三）

Oddly enough, it was the Red Knot decline that made us pay attention to another species in decline. In the past decade, it's been estimated that horseshoe crabs in the Delaware Bay have dropped by 75 percent. It all began in the 90s, when the growing

英语听力：自然百科 马蹄蟹与漂鷸（二）

We are not the only species that's come to dependent on the horseshoe crab, they're critical to others too, like the Red Knot. It's now May in Brazil, the Red Knots have built up their fat reserves and they are now in their breeding plumage. They are

英语听力：自然百科 马蹄蟹与人类（一）

As the water is warm and tides grow high, horseshoe crabs leave the ocean floor and make their way to the shores and estuaries of the Atlantic Coast. Here in the sheltered waters of South Carolina, they suddenly emerge by the thousands in the spawnin

英语听力：自然百科 Bees Key to Better Missiles 蜜蜂：新武器的启示

Honey bees are fairly placid insects when left alone. But if antagonized, they will react violently. Researchers from the University of Queensland in Australia are working to better understand honey bees vision, navigation, and, in particular, aggres

英语听力：自然百科 西撒哈拉的列车

An iron ore（铁矿)train operating across the northwest African nation of Mauritania(毛里塔尼亚) forms a striking image sneaking its way through the Sahara desert. This desert train has had to be adapted to suit the harsh conditions that make

英语听力：自然百科 奇特的深海生物

These aren't Christmas lights. This isn't a mutant lobster. And this fearsome-looking creature is not something you'd ever find at the end of your fishing hook. These are some of the rarely seen sea creatures found deep in the ocean in a world of tot

英语听力：自然百科 淘金沉船

Archaeologists in Canada's Yukon have found whats believed to be the only untouched shipwreck from the Klondike Gold Rush, made famous by writers Jack London and Robert Service. Underwater video, taken with a remote operated vehicle, shows the remark

英语听力：自然百科 纪念《物种起源》面世150周年

One of the most iconic animals of the Galapagos Islands is the Giant Tortoise. Charles Darwin wrote of this tortoise in his famed report , Origin of Species, published 150 years ago this month. The differences between the tortoises from island to isl

英语听力：自然百科 马尔代夫的未来

As dawn breaks, fishermen work furiously to hauling tuna. But while the fish may seem plentiful, there is trouble on the horizon. Fishermen were the fist to notice the alarming effects of rising sea temperatures. Beneath them the coral reefs are dyin

英语听力：自然百科 喜马拉雅冰川融化加剧

Mount Everest looms in the distance. Its snow and ice-capped peak gleams in the sunshine. The Himalayan glacier is a fragile ecosystem, which environmentalists warn could soon disappear. Greenpeace says that as global warning increases temperatures a

英语听力：自然百科 罕见的树袋鼠 -1

High in the northern mountains on the island of New Guinea, in the cloud forest lives an elusive animal found no where else in the world. (Hello!) With an endearing face and a thick fur, the Matschies tree kangaroos of Papua New Guinea（巴布新几内

英语听力：自然百科 罕见的树袋鼠 -2

Papua New Guinean Gabriel Porolak handles the captured male. He is the Tree Kangaroos Conservation Program Research Coordinator and a key figure in the local preservation effort. (Six kilograms.) The captured animal is weighed and examined by veterin

英语听力：自然百科 佛罗里达州的温泉（四）

The cormorant gives up for now. The bird has been foiled by the clarity of the water, the very thing that enables the manatee to thrive. The light through these waters helps plants flourish, and manatees are strict vegetarians. They can eat a hundred