含中文字幕节目   

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In 1977 people began using a new, popular invention - the plastic bag. Clothes stores and food markets all over the world began giving plastic bags to people. Plastic bags were an easy way for people ...

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Science and Technology. Linguistics. Say what? To find new subjects of study, some linguists simply open their front doors. WHERE in the world is the largest number of different languages spoken? M...

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Professor Moniz, thanks very much for talking to us today. Moniz: Pleasure to be here. Steve: In 2003, you and your co-author co-chaired this big M.I.T. study on the future of nuclear energy, in whi...

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Today, we tell about how people learned an important piece of information necessary for safely sailing on the oceans.It is called longitude.(MUSIC)On a foggy October night in seventeen-oh-seven, four ...

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Science and Technology. Human evolution. You look familiar. Another piece of humanity's family tree is fitted into place. THE opening scene of Mel Brooks's film "History of the World: Part One" di...

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Professor Schechter thanks for talking to us today. Schechter: My pleasure to be with you. Steve: Can you give us the brief introduction to dark matter? Schechter: Astronomers measure masses of thi...

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There's a polymerase, a DNA polymerase, which copies both strands of the DNA, the top strand and the bottom strand. Sometimes those two strands are called Watson and Crick strands. But they're not per...

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You know what you are up against when you have a disease without any cure. You do not have any expectations from drugs or medicines. But if you have a disease that can be cured or managed, you do have...