英语听力：探索发现 科学新发现：我们的大气层-24

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

常春藤解析英语【73】Mysterious, Magical Moldavite神秘

Mysterious, Magical Moldavite 神秘的魔法石－捷克陨石 by Luke Dodds This little-known and otherworldly stone is full of beauty and mystery. 这种鲜为人知的石头来自『另一个世界』，美丽且神秘。 With its strangewrinkled

科学美国人60秒 SSS 2014-09-22

Sixty-six million years ago, the meteorite, a rock over six miles wide, slammed into the earth and you know what happened next, the dinos disappeared. but Benjemin Blunder, a planty ecologist at the University of Arizona, says , consider the picture

英文书摘精选 Create Your Own Moon Craters制造属于你自己的月球陨石坑

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

侏罗纪搏击俱乐部 第169期:十年间谜团依旧未解

How big an asteroid would it take to distribute this much Iridium around the entire planet? 到底要多大的小行星才能将这么多铱散布在整个星球上？ And they come up with a very rough number of something on the order of ten kilomet

英语听力文摘 English Digest 615、制造属于你自己的月球陨石坑

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

60秒科学:Murchison Meteorite's Chemical Bonanza

Murchison Meteorite's Chemical Bonanza The 1969 Murchison meteorite was known to harbor complex organic compounds, but a new analysis in Proceedings of the National Academy of Sciences finds that it may also contain millions of chemicals and shed lig

英语听力：探索发现 2014-06-29 BBC 地平线：陨石的真相-21

Comparing the effects of an airburst with a ground strike, it seems the Chelyabinsk got away lightly. Its estimated that the largest piece to hit the ground weighed 500 kilos, a fraction of the asteroids original mass of 7,000 tonnes. Now if a piece

英语听力：探索发现 2014-06-13 BBC 地平线：陨石的真相-14

So was this a near miss for us? If the asteroid had been in a different part of its orbit, so it didnt hit this year but it hit next year, it would have still hit us on February 15th. But instead of coming in over Russia, it would have come in over t

英语听力：探索发现 2014-06-15 BBC 地平线：陨石的真相-15

On June 30th, 1908, a huge explosion tore through the forest of Tunguska, Siberia. It was 20 years before the Russians mounted an expedition to the site. What they found astonished them. 60 million trees across an area the size of London had been lev

英语听力：探索发现 2014-06-20 BBC 地平线：陨石的真相-17

Really, its a balance between the size of the object, its speed into the atmosphere and critically the altitude at which it explodes. Too high, if its too small and it explodes too high, the shockwave has little effect on the ground. If its quite low

英语听力：探索发现 2014-06-22 BBC 地平线：陨石的真相-18

Down on the ground, the scale of impact is even more breathtaking.The crater is more than 1000 meters across and nearly 200 meters deep.The forces here were enoumous.The impact on this solid rock into this pulverized mochi,just bustled in your hand.Y

英语听力：探索发现 2014-07-04 BBC 地平线：陨石的真相-23

As the divers have explored further, they discovered the Siluteis are actually part of a huge complex of tounels and caves.In fact, when you look from above, you can see Senluties scattered across hundreds of kilometers.And when they were mapped, it

英语听力：探索发现 2014-05-14 BBC 地平线：陨石的真相-2

This isnt the first time its happened. Over thelast few years, scientists have examined many other devastating impacts in theEarths past. Using this knowledge, I want to answer the key questions that theChelyabinsk meteor strike raises. Where did thi

英语听力：探索发现 2014-05-16 BBC 地平线：陨石的真相-3

I was shocked. I was truly shocked. I never thought Iwould see an event like this over a major city during my lifetime. We couldnt predict this was going to happen. The pieceof rock that actually entered the atmosphere was relatively small, maybe onl

每日一词【213】impact：影响、作用

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

假如地球只剩最后一小时

What would you do in your last 60 minutes?An asteroid is on a collision course with the earth and you have one hour left to live. What would you do in your last 60 minutes? Not surprisingly, the majority of Britons questioned in a survey -- 54 percen

学个词Learn a Word 第213期 impact

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

英文短篇故事（纽约）413 The Sky Is Falling

An asteroid hurtled past Earth. It was 13 times closer to Earth than the moon is. Then a huge meteorite exploded above a city in Russia. The shock wave shattered thousands of windows. Then a white fireball over San Francisco startled witnesses. Then

Buildings reglazed after meteorite strike in Russia

MOSCOW, Feb. 17 (Xinhua) -- Most buildings damaged by Friday's meteorite fall in Russia's central Urals Region have been restored, and educational institutions will operate as usual on Monday. Xinhua reporters saw in the hardest-struck Chelyabinsk Re