Why does the author begins the essay with a quotation by Edwin P. Hubble and then later suggest a revision of the quotation? How did the two versions of the quotation help shape and refine the essay's central idea?

Explanation:

The quotation that the author mentions in the beginning of the article "Coming to our senses" is

Equipped with his five senses, man explores the universe around him and calls the adventure science.

Later the author says that there are things not detectable by five senses, such as the UV says, infra red rays etc.

These two versions support the central idea that we need to use latest scientific tools and theories to explore the universe, our senses are essential but we need to understand that they are just not enough in this exploration

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