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These are Dog Days at the US Post Office Have you heard of mail dogs? Not male dogs, as in the masculine half of the species. Dogs that actually carried letters and packages in the days of the Old American West. And pooches that tagged along with mai
VOA标准英语2011年(八月)
It is incredible, and it is incredibly hard to believe too, because although we've changed so much, we don't actually see any of those changes happening. Generation after generation, we just look the
生命物语
By David McAlary Scientists have discovered fossils of an ancient, tiny species of human in an isolated part of Indonesia. They are bones from what they say is a smaller version of the now extinct imm
VOA2004（下）--健康科技
New Species Might be Human Ancestor Fossils found in a South African cave might belong to a new species of early humans that holds a unique place on the evolutionary road to modern man. On a 2008 mapping expedition in Malapa, South Africa, American p
VOA标准英语2011年(九月)
The United Nations Assistance Mission for Iraq has released its 13th human-rights report, which covers the first six months of 2008 and shows a marked drop in violent attacks by militias or criminal gangs in the country. But Lisa Schlein reports for
VOA标准英语2008年(十二月)