The country's second lunar probe, known as the Chang 'e 2, has reached an orbit of 1.5 million kilometers from earth.

国家第二个月球探测器，嫦娥二号，已经飞抵距离地球150万公里的一个轨道上。

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There were green turtles in our seas e ons before dinosaurs tramped the Earth; they survived the last ice age; but they may not be with us much longer.

恐龙在地球上出现之前绿海龟于就已在古生代出现；在最后一个冰河 时期绿海龟也幸存下来；但它们与我们在一起的日子可能不多了。

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What can we do to avoid a Wall-E scenario in which the Earth is surrounded by a solid barrier of junk?

如何才能避免出现电影"机器人总动员"描述的那种地球被一层固体垃圾屏障包围的情况？

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And there's been plenty of time for his curiosity to evolve: WALL-E has been alone on Earth for seven centuries, ever since the last humans left and neglected to switch him off.

WSJ: 'WALL-E' Is Richly Human Tale of a Robot

On the third level, it's "Earth Over Time" i.e.

WSJ: How Dallas Does Philanthropy: Perot Museum of Nature and Science

Photos, Christmas cards, magazines, invitations people under a certain age are wondering why on earth anybody ever sent anything in an envelope rather than via Facebook, e-mail, the iPad or the web.

ECONOMIST: America��s postal service will begin to undo itself