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45.The source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Suns very center. It is here that is to be found the source of the energy that the Sun constantly pours out i

Space News

Broadcast: Jan 29, 2003 By Paul Thompson VOICE ONE: This is Mary Tillotson. VOICE TWO: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Today we tell about a space rock that

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Broadcast: Jan 10, 2003 While President Bush is promoting tax cuts to stimulate the economy, some state officials are considering tax hikes to fix their budget problems. California's governor, faced w

The Big Experiment 大型强子对撞机试验

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到 听力原文收集区 ，您将会获得10到30积分的奖励! Thank you！

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There is a special day to recognize the importance of the ozone layer. In 1995, the United Nations General Assembly decided September 16th is the International Day for the Preservation of the Ozone Layer. This is the date on which countries signed th

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Sunscreened Plants 遮光植物 A NASA researcher is finding that alfalfa plants grow more poorly when exposed to UVB -- ultraviolet B radiation from the sun. Learn more about sunscreened plants -- today on Earth and Sky. JB: This is Earth and Sky. Eart

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Scientists Help US Science Teachers in the Classroom Students in the United States in their last year of high school are not performing as well on the same science tests as their peers in many other countries. Educators say there should be more empha

VOA常速英语2014--美国航天局探秘范艾伦辐射带

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Study: Immune System Weakens in Space During the final flight of the US space shuttle Atlantis in the summer of 2011, one of the most important pieces of scientific cargo on board was a medical experiment designed to test how the human immune system

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The solar system is a hostile place. Earth is under attack from deadly cosmic radiation. Life here is only possible, because it's protected by the magnetosphere, an invisible force field that cocoons the planet. But new evidence reveals that this vit

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As the reversal approaches, the decay of our magnetic field will continue and cosmic radiation will get increasingly close to the Earth's surface. As the reversal approaches, the decay of our magnetic field will continue and cosmic radiation will get

英语听力：自然百科 地球力场 Earth's Force Field—3

In polar regions where the magnetic field is / weakest, auroras glow in the sky. These dazzling displays of colored lights form when solar particles slam into gases in our atmosphere causing them to glow. The stronger the solar wind, the more dramati

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As the vast sphere reaches / maximum speed, something incredible happens. Huge lines of magnetism arc in and out of the model core. Well, we can't see the magnetic field coming out of the experiment, we can measure them, we can put many different mag

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Blockson's computer model reveals that at the South Atlantic Anomaly, the magnetic field isn't just weaker than anywhere else on the planet. It's actually reversed polarity. There is a patch on the core in the South Atlantic where things are not poin

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One of the better early attempts at dating the planet came from the ever-reliable Edmond Halley, who in 1715 suggested that if you divided the total amount of salt in the world's seas by the amount added each year, you would get the number of years t

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Newlywed Alexei Sytev and his fellow crewmembers will spend a year and a half living aboard a virtual spacecraft to simulate an actual space mission to Mars Six astronauts are about to experience what it's like to travel to Mars and back, only withou

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VOA标准英语2010年-Obama's 2011 Budget Scraps Manned Luna

The U.S. space agency's ambitious plan to put astronauts back on the moon has been cancelled in the Obama administration's proposed 2011 federal budget. The $3.6 trillion spending plan for the U.S. government was submitted to Congress on Feb. 1. NASA

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Are You Ready? 你准备好了吗？ You might have never heard of the CERN laboratory, but this is all about to change. On 10th September 2008 the most powerful scientific experiment ever attempted will take place at this quiet research centre near