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Study: Cheetah Population Dwindling 研究发现猎豹数量正在减少 In 1900, cheetahs numbered around 100,000. Today, there are just 10,000 in the wild. A new study says being fast is not enough to survive. Everybodys knows cheetahs are fast. So

美国有线新闻 CNN 2013-06-10

Welcome to Wednesday. This is CNN Student News. We're going to get things started today with different forms of extreme wheather. First up, fire. This one in California has burn more than 30,000 acres, but fire fighters have around 60 percent contain

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Some are little more than rocks, others substantial mountains, covered in woodland. The first British person to see that was captain Cook, who stood here in 1770, and for the first time, realized the scale of the Great Barrier Reef. He also realized

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That'true. monarch butterflies lay their eggs on milkweed plants.The caterpillars feed on milkweed, from which they extract substances called cardenolides, a type of chemical that can cause heart arrhythmia. This toxin doesnt affect the caterpillars

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What Animals Are Most Like People 什么动物和人类最像 Once again we go to the mailbag. A listener writes: 我们又一次打开邮箱。一位听众写到 Dear A Moment of Science, Besides chimps, which animals do you think are the most like

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Tim Cope Explorer Wolves and Dogs Tim Cope is an award winning author, adventurer, explorer and film-maker with a special interest in the traditional cultures of Central Asia and Russia. He has worked as a wilderness guide in the sub-arctic regions o

国家地理:Octopus Loses Arm 章鱼逃命大法

Here in the Timor Sea off northern Australia, take a look at a creature that seems to have the soul of a riverboat gambler. It moves through turf dominated by large hungry predators, and it fights these predators in a way that will astound you. This

国家地理:Picky Frog Mom 挑剔的青蛙妈妈

Here in the South American rainforest, you're watching what should be a joyous event, the laying of hundreds of eggs by a mother frog. In truth, only a very few of these eggs will blossom into full frogdom. Drought will take a toll, and predators wil

英语博客：Fire to the West.

Do you remember a few episodes ago, a podcast called Smoke to the North? We learned how to say that something is going on in a particular direction. Well, recently, we have had very bad fires to the West which are still burning. The photo on the blog

Scientists Link Antarctic Ice Melt to Decline in Staple Food

By David McAlary Ocean animals in parts of Antarctica are facing a food shortage. A new British study finds that a staple of the marine wildlife diet, tiny shrimp-like creatures called krill, has dram

VOA常速英语2018--雪鸮：生活在北极的鸟类

From a birds eye view the vast Alaska tundra is nothing more than an endless flat surface symmetrical and seemingly uninhabited.However, a closer look shows that it is home to lots of busy creatures that live comfortably and the grass and pits filled

英语听力视频：国际名模深海与鲨鱼共舞

神奇女子与鲨鱼和谐共游 Woman Swims With Sharks in Perfect Harmony The woman can hold her breath for six minutes while swimming with the predators.

VOA标准英语2010-African Farmers Growing Organic Foods for

A melon field is pictured at a farm in the village of Djilakh, 80km south of Dakar, Senegal on 22 Apr 2008 (file photo) African farmers are making more money producing organically grown crops for European markets, where demand for healthier food is g

VOA标准英语2011--Trauma Center Treats Sea Turtles

Trauma Center Treats Sea Turtles This month, on beaches up and down the U.S. East Coast, tens of thousands of newly-hatched loggerhead sea turtles are emerging from the sand and crawling into the Atlantic. Very few of these baby turtles will survive,

VOA标准英语2014--Racing to Save the Cheetah

Racing to Save the Cheetah A wild cheetah sprinting across the African savannah has been described as poetry in motion. Dr. Laurie Marker can understand why. The award-winning conservationist and renowned cheetah expert has devoted her life to the pr

英语听力—环球英语 1295 Fish in Danger

Voice 1 Welcome to Spotlight. Im Christy VanArragon. Voice 2 And Im Joshua Leo. Spotlight uses a special method of broadcasting. It is easier for people to understand - no matter where in the world they live. Voice 1 A beautiful orange and white clow

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文本： The South Pacific is a vast ocean wilderness. Its waters are teeming with life, from tropical coral reefs that attract the great variety to the cooler, temperate waters that attract the great numbers. So why is it that in the midst of all t

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What on earth could drive this headlong rush to slaughter? Only earth herself with her insistent clocks. This story begins in the Great Rift Valley, where the continent is tearing itself apart and being reborn. The plains in the shadow of the rift, t

英语听力：自然百科 大迁徙 Great Migrations—16

Finally, they can rest. For another five months, they will cling to this winter refuge, entering a sort of waking trance of energy conservation. Until the longer days of spring awaken them again to mate and pass along to the young--their migratory im

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Last time we discussed how human beings are the only primate that walks on two feet. One theory for how this might have happened says that, when our species was just getting its start, reaching up for fruit was a good thing to be able to do. Those wh