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For something that could revolutionize the world, its come along very slowly. The fuel cell was invented in 1839, but there was little development until the 1950s when NASA started to use them in space where they are still used today. Now, after yea

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Why Lettuce Should NOT Be Frozen Stroll through the frozen foods section of the supermarket and youll find frozen corn, peas, and beans. A Moment of Science wonders, why isnt there any frozen lettuce? 图片1 Why Cant I Freeze Lettuce? Freezing is a

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But there was something even better. Odyssey may not just have found ice. There may also be liquid water, and that means, there could be living creatures there too. Right now, there might be liquid wa

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By Bill Rodgers Washington 19 May 2008 Cell phones are an example of what is sometimes now called leapfrog technology, a product that allows developing nations the benefits of a reliable and extensive communications network without the heavy investme

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[Part 4] She rose, took her stockings over to the stove and hung them on the damper. It was an unusual damper, and she turned it about, and then, stepping lightly on her bare feet, returned to the bench and sat down there again with her feet up. Ther

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Sally was petting her cat. Her cat's name is Kitty. Kitty is a large black cat. Sally ran her finger down Kitty's back. She loved her cat. Her cat smelled like shampoo. She had been washed that morning. Cats do not like water. Kitty, on the other han

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VOA常速英语2007-Conference Says Stem Cell Research is Robust

By Victoria Cavaliere New York 16 October 2007 An annual stem cell research conference in New York has been bringing together some of the field's top scientists to discuss breakthroughs in stem cell research and what proponents call its long-term app

VOA常速英语2008年-FCC Approves Cell Phone Alert System

By Paul Sisco Washington 17 April 2008 Federal regulators in Washington have approved plans to upgrade the nation's Emergency Alert System to include text messages to cellphones and other mobile devices. VOA's Paul Sisco has more in this Searching fo

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What was actually interesting to us was not that the bacteria made light, but when the bacteria made light. 事实上，我们感兴趣的部分并不是细菌会不会发光，而是细菌何时发光。 What we noticed is when the bacteria were alo