Earth and Sky:Water Cycle 水循环

Water Cycle 水循环 All the oceans on earth are salty, while inland water is typically fresh. How does water become salty? We'll answer a listener's question -- today on Earth and Sky. DB: This is Earth and Sky. We recently visited the Austin Childr

Horizon - Life On Mars 火星生命 - 8

But even if there had been water, life doesn't start overnight. Even a simple microbe is the product of complex chemical systems that take millions of years to evolve. Had the water lasted long enough

Wild Europe - Genesis 肇始之初- 4

This was no ordinary forest. What looked like trees were in fact giant fern s, horsetails and club mosses , the fossils of which have been exquisitely preserved in this Scottish park. They offer a gli

地球？火球？

It's a slow drip, but it's melting glaciers and we are to blame. That's according to a new research which finds the earth is now the hottest since it has been in 400 years and potentially the last 200

VOA慢速英语--非洲猴面包树因干旱或枯萎而死发

Africa's Baobab Trees Are Dying Baobab trees are not only iconic images of dry, hot areas of Africa. Baobabs are important because they supply water and food for people and animals. They are sometimes called the tree of life. Yet, say researchers, so

2006年VOA标准英语-UNICEF: Children in Ethiopia Facing Lethal

By Lisa Schlein Geneva 31 March 2006 Women fetch water in drought-hit Dubluk, Ethiopia The U.N. Children's Fund, UNICEF, says Ethiopian children are facing an epidemic of lethal diseases. UNICEF says

SSS 2008-09-24

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Theres a Native American site in Ohio that appeared to be a fort. But recent discoveries by archaeologists at the University of Cincinnati show thats n

Mars Rover Finds Evidence of Ancient Sea

Mars Rover Finds Evidence of Ancient Sea David McAlary The U.S. space agency NASA says Mars once had a shallow, salty sea that could have supported life. The evidence has come from chemical and physic

SSS 2010-04-09

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This'll just take a minute. As scientists delve deeper beneath the oceans surface, they find bizarre creatures that have adapted to harsh and extreme environments. Now comes a new o

美联社新闻一分钟 2005-09-17

美联社,新闻一分钟,Bush,hurricane,violence,1.President Bush says rebuilding the hurricane battered Gulf Coast must take aim at wiping out persistent poverty and racial injustice . 2.In Iraq, a leading Sunni cleric urges unity against violence

VOA标准英语2010年-Climbing Mt. Kilimanjaro to Raise Awar

Joe DeCapua 23 March 2010 There are many, many reasons why we need to focus on (water) as an integral part of our livelihood as human beings and the livelihood of our brothers and sisters around the world. Monday was World Water Day, an annual event

VOA标准英语2012--Lake Sediment Could Better Date Ancient Finds

Lake Sediment Could Better Date Ancient Finds Radiocarbon dating is the best-known and most widely used method to determine the age of organic material, such as bone or wood or plant matter. All such material contains radioactive carbon atoms, known

英语听力：自然百科 大堡礁：珊瑚礁到雨林—26

These huge tracks of rainforest close to the Queensland coast are essential because they regulate the flow of water and the sediment it contains. Thats important, because theres an awful lot of water here. Hot humid tropical air gives rise to vast am

英语听力文摘 English Digest 501、那片珊瑚HOLD不住了！

Aah, snorkeling in the Great Barrier Reefblue, clear water, magnificent coral, beautiful fish. How about cloudy water and dying coral and you have to look pretty hard to spot a fish anywhere? Nobody would want to go snorkeling in waters like you just

CCTV9英语新闻：印度巨型沙雕凸显气候变化的影响

As the death toll from the heat wave continues to rise...one Indian artist has carved a giant sand sculpture in the country's eastern city of Puri that highlights the dangerous effects of global warming. A simple but bold message...Act fast before it

澳科学家警告海平面上升问题

CANBERRA, Oct. 14 (Xinhua) -- Australian scientists have made the alarming discovery that sea levels have risen more in the past century than at any other comparable period in the past 6,000 years. Researchers from the Australian National University

2007年VOA标准英语-UN Warns of Health Crisis in Flood-Stricken Sou

By Lisa Schlein Geneva 07 August 2007 A woman wades through a flooded street to collect food in Sirajgonj, about 104 kilometers (65 miles) north of Bangladesh's capital Dhaka, 03 Aug 2007 United Nations aid agencies are warning that millions of peopl

万物简史 第459期:生命在前进(1)

21 Life Goes On 第二十一章 生命在前进 It isn't easy to become a fossil. 要变成化石可不容易。 The fate of nearly all living organismsover 99.9 percent of themis to compost down to nothingness. 几乎所有的生物其中的99.9%以上

英语听力：Prophet Muhammad 先知穆罕默德 - 15

With Byzantine artisans, they had decorated it with golden mosaics of an Islamic paradise. The Great Mosque of Damascus would become a model for new mosques to come all across the empire. The Arabs transformed their conquered lands, maintaining, impr

2015年CRI 中关村环保科技亮相国际环保展

A series of new technological innovations developed by companies based in Beijing's Zhangguancun area, dubbed China's Silicon Valley, have been unveiled at an environmental exhibition in the Chinese capital. CRI's Li Ningjing has more. This year, new