英语听力：自然百科 澳洲沙尘暴

Australia's worst dust storm in 70 years blanketed the countrys east coast Wednesday in a cloud of red outback grit. The reddish pall swept into the cities of Sydney and Brisbane overnight, bringing an eerie orange dawn to Sydney. The color was amazi

英语听力：自然百科 死亡谷

Devil's Hole, where the earth opens to reveal a rare window into Death Valley's most implausible underworld, a universe of water. In twisted irony, the driest place in the hemisphere sits atop one of the largest aquifer systems in the United States,

英语听力：自然百科 Dung Heats

The picturesque Western Cape mountain range at the southern tip of Africa lays claim to one of the world's most diverse floral kingdoms. And researchers are scouring the mountains in search of the droppings and urine of a small local inhabitant which

英语听力：自然百科 生命之树

Sycomore figs are found throughout tropical Africa. In Southern Kenya they thrive along river banks. This is the story of one of those trees. Our African queen is a mature sycomore fig. She started life as a seed one hundred years ago. She provides f

英语听力：自然百科 格陵兰岛冰原融化

As five European foreign ministers meet in Copenhagen to prepare for an aggreement to succeed the Kyoto Protocol, scientists in Greenland are warning about accelerated glacier melts. Several years ago, scientists reported that the Helheim Glacier, su

英语听力：自然百科 濒临灭绝的鼠兔

Autumn in the Rocky Mountains, a time of change. Aspens turn golden and the bull elk, in the midst of their mating season, work hard to catch the eye and ears of the ladies. Up in the highest peaks, another call rings out. It's the pint-sized prince

英语听力：自然百科 海军护卫海龟繁殖

As thousands of turtles arrive at a beach in Oaxaca, Mexico, to lay their eggs this season, federal and local authorities have been deployed to protect them against poachers. As the turtles nest on the Pacific coast, Mexican Navy patrols keep watch a

英语听力：自然百科 驼背鲸

Off the coast of Boston, scientists scan the horizon for something largehumpback whales. In the busy waters of the Stellwagen Bank, National Marine Sanctuary, whales must navigate around submerged fishing gear. And on the surface, collisions to the s

英语听力：自然百科 澳洲夜宴蛙

The tiny northern corroboree frog of Australia is only just hanging on. Populations of both the northern and southern corroboree frogs have declined catastrophically in the wild over the last two decades. The primary culprit is the deadly chytrid fun

英语听力：自然百科 古罗马皇帝维斯帕西安的降生地

Archeologists in Italy have unearthed a sprawling country villa they believe to be the birthplace of Vespasian, the Roman emperor who ordered the beginning of the Colosseums construction during his reign. The 2000-year-old ruins were found about 80 m

英语听力：自然百科 表情机器人

A walking humanoid robot(类人机器人) able to use its whole face and body to express emotion was unveiled this week in Japan. The robot was created by scientists at Tokyo's Waseda University and its makers say its the first of its kind. It is abl

英语听力：自然百科 雷雨天，最安全的地方是？

This weekend Why Tell Me Why were answering a viewer question about lightning safety. So you want to find out where the safest place to be is in the lightning storm. So where is the safest place to be? Actually, the safest place to be is inside an en

英语听力：自然百科 死海岸边的致命沙洞

The Dead Sea is the lowest point on earth and runs more than 50 miles in length and stretches 11 miles across its wildest point, bordering Israel, The West Bank and Jordan. Large sections of the coast are fenced off and sign posted in Hebrew and Engl

英语听力：自然百科 深海奇鱼

Rick swims through a shadowland thousands of feet deep. Out of the dark, animals can materialize not just from in front or behind, but above or below as well. Were down swimming around in that dark sea, looking in a miniature world and suddenly I fee

英语听力：自然百科 鲨鱼的危机

The sharks are under increasing threat around the world from overfishing. They are used as a food item in many parts of the world. Shark fin soup is particularly popular in Asian countries. And sharks are easy to catch. You put a baited hook in the w

英语听力：自然百科 为什么海水是咸的？

This week on Why Tell Me Why, we are finding out why the oceans are so salty. So the oceans are salty because the oceans have been around, lets say, for over five hundred million years. And over the course of time what we found out is that weve alway

英语听力：自然百科 秦兵马俑第三次考古挖掘

Chinese archaeologists have started to excavate more of the life-size terracotta warriors at the famed ancient tomb of the country's first emperor. China state TV on Sunday showed archaeologists uncovering more of the elaborately carved soldiers, to

英语听力：自然百科 血型的奥秘

Kasey on Why Tell me Why. Someone asked why veins are blue and blood is red. So that's part of this question: why do we have different blood types? Blood types are inherited, just like you inherit your eye color, or your hair texture, so you get a ge

英语听力：自然百科 为生而死的生物

Hi, its Kasey-Dee Gardner, in this weekend Why Tell Me Why will answer an interesting viewer question. The viewer wants to know why certain species die after they reproduce. So, we're here to find out the answer. Urn, so there are a bunch of species,

英语听力：自然百科 地球自转的奥秘

Well, the story of the earth spin goes back all the way to the origin of the solar system, four and a half billion years ago. The solar system started out as a cloud of gas and dust. And these gas and dust clumped together to form the sun and the var