教育学习   常速英语

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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, ...

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There's a cross-section of that sort of tower, which is known as a villus. And the villus is lined by cells on the outside that are the fully differentiated cells that play an important...

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Everything that you can actually see with your eye is just the smallest sliver of life on this Earth. Most of life is invisible. We still have this idea that we're the most central ...

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DNA sequencing technology has been revolutionized in the last several years, not only in the price-- it's no longer cost prohibitive to dream of any kind of sequencing project--but also the depth at w...

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SPEAKER 1: Two groups of animals are defined as different species when individuals from one group don't mate and reproduce with those from the other. One way a species can split into two is for pop...

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[SAWYERS:] BCR-ABL is a kinase. I want you to watch it change. It's flipping back and forth from an active to an inactive conformation. Now, we're looking at the skeleton and you see that lo...

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ANDREW BERRY: Evolution by natural selection. This is an idea that has been sought after since the dawn of human thought. And it was a theory that was discovered by two people, and we've...

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The malaria parasite is an ancient organism. It has been with us since before we were human. Famous victims include Alexander the Great Genghis Khan and George, Washington. The malaria lifecy...