常速英语

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Human existence is scary and confusing. A few hundred thousand years ago, we became conscious and found ourselves in a strange place. It was filled with other beings. We could eat some; some cou...

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Polymerase chain reaction-- or PCR-- uses repeated cycles of heating and cooling to make many copies of a specific region of DNA. First, the temperature is raised to near boiling, causing the double s...

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So this squid is a nocturnal animal. And so what we've done is we put this poor guy in his water during the day. And he doesn't like it. So he looks kind of uncoordinated, he looks a...

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Humans have existed for millions of years, as part of nature. But then, something changed. And in an incredibly short amount of time.. ..We terraformed this planet and designed it to fit our nee...

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So let's look at what these guys will eat. If I could have the video, please. So this snail has its proboscis stuck out. That's the translucent yellow tube. And you can see, it stings...

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In the year 1014, Byzantine Emperor Basil the Second defeated the Bulgarian army and captured 15 thousand prisoners. He could've killed them, but he had a different idea. He wanted to weaken his...

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So what you're seeing first, this is just DNA in the bacterial cell. And we've color-coded the genes. So that's the LUX operon. There's five genes in that operon. And somewhere else ...

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Never before in history, have there been so many people on Earth as right now. Our numbers have skyrocketed, from 1 billion in 1800, to 2.3 billion in 1940, 3.7 billion in 1970, and 7.4 billion in ...