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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Some people are worried that the more we learn about genetics, the closer well get to a day when we can choose all sorts of characteristics for our bab

发表于:2018-12-24 / 阅读(71) / 评论(0) 分类 Scientific American(三)月

TED演讲：揭露海底惊奇(2)

But I want to jump up to shallow water now and look at some creatures that are positively amazing. 不过我现在还是想说说浅水里的世界，来看看那些神奇的生物。 Cephalopods -- head-foots. As a kid I knew them as calamari, mostl

发表于:2019-01-18 / 阅读(54) / 评论(0) 分类 TED演讲教育篇
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