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This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. Thars gold in them thar hillsand we may have meteorites to thank. Because it appears that a rain of meteors nearly 4 billion years ago peppered the Earths

发表于:2019-01-08 / 阅读(255) / 评论(0) 分类 Scientific American(九)月

This mining school, complete with sled dogs, was set up in Seattle as a training site for potential Klondike prospectors. Lots of Americans have heard of the Klondike because of a popular ice-cream bar named after the place. It's in Canada, so we cou

发表于:2019-01-13 / 阅读(202) / 评论(0) 分类 VOA标准英语2010年(八)月

Or at least plenty of money wagered in Deadwood's gambling halls Ted Landphair | Washington, DC 03 June 2010 In the 1980s, town commissioners decided to fix up Deadwood and make it a genuine historic attraction. About one million people visit each ye

发表于:2019-02-03 / 阅读(367) / 评论(0) 分类 VOA标准英语2010年(六)月
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