教育学习   常速英语

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A smooth stone is given an edge and the course of life on Earth has changed forever. This was the first step on the journey to our technological present. [MUSIC PLAYING] Though too...

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MOTT GREENE: Hardly anyone in the early 20th century said, why are there oceans, and why are there continents? Wegener is a wonderful example of how science benefits from people coming fro...

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The idea is to sequence the DNA from a patient with cancer, sequence the tumor DNA, as well as the nontumor DNA, to identify all the mutations that are just found in the tumor DNA and not...

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But what we're gonna be more focused on exclusively focused on today is what we call bottom-up mechanisms, and that involves competition between ecologically similar species and how tha...

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This is where some new technologies come in and enable us to do some really exciting things, okay? So the strategy is called DNA metabarcoding and I'll explain what that means. So an animal d...

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JESSE BARBER: This looks like perfect bat habitat. I came to Gorongosa to study bat-moth interactions. And I've done work in the tropics all around the world, but never in Africa. And s...

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MEAVE LEAKEY: I've never really thought footprints are terribly interesting. But those particular ones, because of their age, because how well-preserved they are, they're absolutely uniqu...

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PER AHLBERG: You have this fish that's-- it's like a sort of living time machine. SAMANTHA WEINBERG: It was like looking at a dinosaur, this creature that has been around for 400 milli...