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This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? To keep your car purring, you have to change the oil. Such maintenance produces eight billion gallons of used motor oil annually. Some waste oil does get re-refined to pro
Scientific American(三)月
图片1 图片2 by Jason Marshall A few articles ago, I asked if you ever found yourself at restaurants fumbling to figure out how much to tip; I guessed that you might occasionally resort to seeking advice from your smart phone; and I told you that
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This is Scientific American's 60-Second Science. I am Steve Mirsky.Got a minute? Talk about your vicious cycles. A new study finds that belly fat could be making you hungrier. Which would lead to more belly fat. The research was performed at the Univ
Scientific American(四)月
Algae seem harmless enough. These precursors to plants thrive throughout the world's waters. But these single-celled plants have global consequences. We can thank them for oxygen in the atmosphere, oil in the lithosphere as well as dead zones in the
Scientific American(十一)月
President Obama Sets His Goals for 2013 From VOA Learning English, this is IN THE NEWS in Special English. President Obama set out goals for his second term earlier this week during his fifth State of the Union message to Congress. The president spok
2013年VOA慢速英语(五)月
IN THE NEWS - President Obama Sets His Goals for 2013 新闻报道 - 奥巴马确立2013年执政目标 From VOA Learning English, this is IN THE NEWS in Special English. 这里是美国之音慢速英语新闻报道。 President Obama set out goals
2013年VOA慢速英语(二)月