常速英语

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For most of our history, the human population grew slowly, until new discoveries brought us more food, and made us live longer. In just a hundred years, the human population quadrupled. Th...

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GREG CARR: I flew over Gorongosa. I'm looking down, and it's magnificent. There's a great lake in the center of the ecosystem. There's rivers. There's a mountain with a rainforest. ...

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Sometimes the world feels...hmm, boring. We've visited all the remote islands, conquered the Arctic, and penetrated the deepest jungles. But there is still one place to explore. It's a wet an...

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ALVARADO: Imagine that somebody came and told you that there were animals whose heads could be decapitated, and that, in the span of a short period of time, these heads would begin to grow again from ...

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This is the picture we've all been waiting for. The deepest image of the cosmos ever captured. Humanity has never seen so far back and so clearly into the depths of the universe's hi...

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[Jennifer Doudna:] Science is a serendipitous endeavor. We're exploring nature and trying our best to get at the truth. And every now and then, we're surprised. [Ethan Bier:] When I first hear...

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Some groups just don't get along. Every day, billions of soldiers fight a merciless war on thousands of fronts, and it's been going on for over 100 million years. The World War of the Ants. [...

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SPEAKER 1: The tropical forests of Colombia are home to a myriad of plant and animal species. Like many of the world's forests, this one in the Middle Magdalena Valley is also under threa...