Listening Passage Analysis: The Northern Land Bridge

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In this set of materials, the reading passage discusses the Northern Land Bridge, and the listening passage explains contradictive opinion about that theory delivered by the professor. In the reading passage, the author states that the Northern Land Bridge has an important role in people migration between Asia and America continent. It was formed in glacial period and it connected America continent to Eastern continent. After the “Land Bridge” was appeared, many people began to migrate from Asia to America. However, this migration was ended by the ending of the ice age, because the ocean level rose and covered the “Land Bridge”. This isolation made the new migrants were trapped and had to stay and shuttled in America continent. In the