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This is a genuine iron meteorite, this is believed to have once been part of the core of a long dead planet or asteroid, and this was found right here in this strewn field, this remarkable little shapes, indentations on the surface are called thumbpr

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(NASA Administrator Dan) Golden accepts that the search for life on Mars is not over.

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Yes,that's right,they've already seen in some parts of the wetlands here,the more remote islands that some of that sheen on top of the water is coming ashore and affecting some of the islands on the uttermost parts of wetlands.The real fear is that h

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Lesson 71 Television Day: Moonflight TV Commentary: Last week we recorded this interview with one of the astronauts who had returned from a recent moonflight. We asked him tc tell us what he had done and what he had seen. We asked him what it was lik

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38.Request 请求 1.Could you possibly let us know as soon as you decide? 2.Can you wrap it for me,please? 3.Do you think you could possibly move your car forward a bit ,please? 4.I'd like some ciggarettes,please. 5.Is there any chance of attending yo

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What makes science really fun is when you get to do things yourself, so today were going to be making moon craters. 科学真正变得有趣的时刻就是当你亲自实践的时候，那么今天，让我们来一起制作月球陨石坑吧！ They

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World recession 世界经济衰退 A: Now people are talking about world recession, which started more than a year ago. Can you give us your personal assessment of the situation of the global economy? B: As you know, we are in a very special time. Th

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Using science as a guide, we attempt to recreate the final moments of the dinosaurs. 我们以科学为指引，试图重建恐龙的最后时刻。 The first effect was the impact itself. 第一个效果是撞击本身。 So when a 10-kilometer diam

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Create Your Own Moon Craters! What makes science really fun is when you get to do things yourself, so today were going to be making moon craters. Theyre the roundish blast-marks left on the moons surface by ancient meteorites. The moons surface is co

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Last October, a NASA rocket, traveling at a speed of 9,000 kilometers per hour, smashed into a dark crater on the moon's south pole. Upon impact, the Centaur rocket kicked up a cloud of debris and elements from the moon's surface, creating a so-calle

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SCOTT SIMON, HOST: School architecture has changed over generations. We've gone from one-room schoolhouses to open classrooms, from blackboards to whiteboards to tablets. And yet, schools designed for one era often have to meet the needs of students

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RACHEL MARTIN, HOST: The Republican health care plan the House passed back in May dramatically scales back Medicaid funding. The Senate is wrestling with that issue now, and it's a huge sticking point. So we're taking a look at where Medicaid money a

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今天我们要学的词儿是impact。 Impact是影响、作用的意思。美国总统布什宣布对苏丹政府实施新的制裁。美国官员说，The sanctions will have a serious impact. 意思是制裁会产生重大影响。发展旅游业的

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By Mil Arcega Washington, DC 04 May 2006 watch Ripple Effect of Oil report The latest data on consumer spending shows the U.S. economy continues to expand at a healthy pace. But some economists fear o

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Do you know the word impact? Impact means the action of hitting something with a lot of force. So, if two cars hit each other, we can talk about the impact of the collision. But generally we use impact in a figurative way we use it to mean a big effe

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今天我们要学的词儿是impact。 Impact是影响、作用的意思。美国总统布什宣布对苏丹政府实施新的制裁。美国官员说，The sanctions will have a serious impact. 意思是制裁会产生重大影响。发展旅游业的

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World recession 世界经济衰退 Now people are talking about world recession which started more than a year ago. 现在人们都在谈论一年前开始的世界经济衰退， Can you give us your personal assessment of the situation of the globa

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On earth, Hawaii has some of the most spectacular shield volcanoes that are very similar with the volcanoes we see on Venus. The huge gently sloped volcanoes of Hawaii may be impressive. On Venus there are at least 150 ranging from this size to ten t