NPR 2012-03-10

The US is seeing its strongest three months of hiring since the start of the recession. The Labor Department reports an increase of 227,000 jobs in February. The numbers from the previous two months have also been revised upward. But the unemployment

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pbs高端访谈:大峡谷的历史还要往前追溯六千万年?

MARGARET WARNER:Finally tonight: Just how old is the Grand Canyon? The conventional wisdom holds that this natural wonder of the world was shaped by the Colorado River about five or six million years ago. But there's been a long-running debate over w

SSS 2009-11-13

Algae seem harmless enough. These precursors to plants thrive throughout the world's waters. But these single-celled plants have global consequences. We can thank them for oxygen in the atmosphere, oil in the lithosphere as well as dead zones in the

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MESSENGER Probe Sends First Mercury Images

The U.S. space agency(代理中介) has released the first ever image taken of the surface of Mercury from a spacecraft orbiting the planet. The black and white image, posted on the NASA website Tuesday, shows a surface pocked with craters of varying

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The U.S. space agency NASAs Messenger probe（正直的，廉洁的 ） is scheduled to reach Mercury later this week, and become the first spacecraft to orbit the planet closest to the sun. During Messengers year-long orbital mission, scientists exp

China has full picture of coastal water resources

China has full picture of coastal water resources BEIJING, Oct. 26 (Xinhua) -- China on Friday officially concluded an eight-year-long national marine survey, giving the country a true picture of its coastal water resources. Launched by the State Oce

科学家宣布地质纪元进入人类世

These are called love tents but they're not what you think. 虽被称为爱的帐篷，但是它们可与你所想不同。 Chinese colleges have come up with an unusual way to help freshmen settle in. 中国的大学别出心裁，以一种特殊的方

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The United States of America's Declaration of Independence would be signed in the last half-inch. 美国的独立宣言签署在最后的半英寸。 Or if we compared geologic time to a woman stretching her arms to a span of six feet, 如果我们将地

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Chinese authorities are planning to survey the Diaoyu Islands in the East China Sea as part of a program to map its territorial islands and reefs. A Chinese Foreign Ministry spokesperson said the move is aimed to safeguard China's marine rights. The

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今天我们要学的词是survey。 Survey, 是调查的意思。有些调查很正式。比如说，A comprehensive survey shows that support for suicide bombing against civilians has fallen sharply across the Muslim world since 2002, 一项综合调

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TED演讲:用玩具创造世界(5)

Now, as we pull down here, we still have a whole set of creatures living on the surface of the planet. 现在当我摧毁这里的时候，在这个星球上其实还居住着一系列的生物， There are all these different dynamics going on here.

万物简史 第330期:美丽而危险(13)

Eighty million tons of rock, moving at more than one hundred miles an hour, just fell off the mountain, 8000万吨岩石以每小时160公里的速度从山上崩塌下来， traveling with such force and momentum that the leading edge of the landsli

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Plate Tectonics and Sea-floor Spreading The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part of the underlying mantle.The lithosphere is divided