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A university lecture by a professor on the possibility of life on Mars

Listen to audio recording and answer the questions

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What are "canali"?


What is this lecture mainly about?


Judging from the lecture, how would you describe the results of the Viking biological experiments?


Which is NOT true of meteorite ALH84001?


What are scientists now focussing their research on?


According to the lecture, why is it difficult to disprove the existence of life on Mars?

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