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One of the most intriguing uses of stem cells can be found in the field of regeneration. Whether the goal is to regenerate damaged heart or nerve cells or to regenerate an entire limb, ...

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When the nucleic acid is relieved of the constraint of being sort of lockstep with another strand in a double helix, it's free to take on all kinds of shapes because it can interact w...

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Zimmer: Another thing about E. coli is that to understand what it means for it to be alive is to understand how it's alive with other E. coli. For a long time, scientists just thought about E. coli ju...

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The inner cell mass cells, which are going to be removed and grown in a Petri dish. We first remove the outer layer that would normally form the placenta. Here the cells are put into a...

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Steve: E. coli is obviously fascinating we have, what did you say, we have about a billion of them in our bodies at any one time? But what the zest [possessed] you would [to] actually spend, however m...

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Here we're going to go through quickly the early stages of development again. And then we're going to get to this stage when the germ layers are set aside. The three germ layers, the ...

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Electronic education. Flipping the classroom. Hopes that the internet can improve teaching may at last be bearing fruit. THE 12-year-olds filing into Courtney Cadwell’s classroom at Egan Junior H...

电子教学 跃然于教室间 但愿互联网可以改善教学的希望终能修成正果 Egan初中坐落于硅谷郊外郁郁葱葱的洛斯拉图斯，那里12岁的孩子们选了考特尼·卡德威尔老师的课程，他们每个人都从手推车里拿一部白色笔记本电脑，然后登陆到网站...

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Steve: What, really, is intelligence? Zimmer: Well there are a lot of different ways of testing intelligence, and you can find them on IQ tests and other kinds of tests; and they tend to correlate to...