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NARRATOR: African savannas are famous for their diversity of large mammals. But how do so many similar species coexist in the same place? Princeton University biologist Rob Pringle i...

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So termites build these huge, huge mounds. And inside the mound, there's a great deal of activity that's going on. So termites go out. They forage for plant material, which they find in actual...

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KEN DIAL: The evolution of flight in birds has long been a great scientific puzzle. Fossil evidence from the past 40 years has established that birds descended from theropods-- a linea...

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Princess Lenore loved cakes.She once ate so many that she became sick.And the king's doctor could do nothing to help her.The king promised his little daughter anything she wanted if she would just get...

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Skin covers all our bodies, but its color varies from person to person. To understand why, we need to peer inside its layers. [music plays] Skin cells and their allies--hair, sweat an...

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ANTHONY BARNOSKY: Species do not last forever. You can think of species a lot like you think of a human lifetime. They have a beginning and they have an end. SPEAKER 1: Anthony Barnosky...

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Britain. Linguistics. Argot bargy. Why urban teenagers speak the way they do? In her novel “White Teeth”, published in 2000, Zadie Smith noted that in London, “all kids, whatever their nationali...

英国 语言学 方言来袭 城里的年轻人为什么那样说话 扎迪史密斯在2000年发表过一部小说，名字叫《白牙》，在书中，她提到在伦敦，所有的孩子，不管他们来自哪里，似乎用牙买加口音表达自己的鄙视。从那时起，语言学研究者逐渐明白了如何以...

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Corals are small animals, but they build structures that you can actually see from space. And as we zoom in we see the reefs where I work on a little island called Ofu in American Samoa, ...