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Have you ever wanted to turn down the volume at a deafening concert or noisy bar? Envy the whale: a new study finds that toothed whales can reduce their own auditory sensitivity when they expect a loud sound. The work is presented at this weeks Acous
Scientific American(五)月
By Delia Robertson Johannesburg 12 March 2008 Scientists from a South African university have found evidence of a population of what they say were small-bodied modern humans on an island of Palau, east of the Philippines. VOA's Delia Robertson report
VOA标准英语2008年（三月）
-If you look carefully, you can see there are stone artifacts. This black marterial here is a burnt material. So that's an ancient fireplace.-So that would have been for cooking. -For cooking the shellfish and so on. We find animal bones, etc, in her
自然百科2012年
It's believed that our species, Homo sapines, has wandered African lands for at least a quarter of a million years. But maybe this was the place where evolutionary leap took palce. This is what a courteous team of 15 scienists are investigating. And
自然百科2012年
By Steve Mort Tampa, Florida 03 July 2007 An American company is in the process of determining the value of a haul of sunken treasure, thought to be the biggest ever discovered. Odyssey Marine Exploration says it is examining more than half-a-million
2007年VOA标准英语（七月）
Barack Obama's favourite TV shows: Boardwalk Empire, Modern Family and Homeland 奥巴马的最爱美剧：黑帮剧《大西洋帝国》、喜剧《摩登家庭》和反恐剧《国土安全》 Mr Obama admitted his taste in TV is a little darker th
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