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[全屏观看] 点击右键- 另存为 可保存这个Flash影片...
[全屏观看] 点击右键- 另存为 可保存这个Flash影片...
This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Bacteria are amazingly adaptable. They live in hot springs, in the dead sea and of course inside people where they can dish up some truly nasty diseases....
Time again for StoryCorps, traveling the country recording your stories. Last week, we heard remembrances of the Great Depression. Today, we revisit that time with sisters Evelyn Palmour and Doreene McCoy. They were just children when the Depression...
