English, asked by palakkrishnani100, 6 days ago

dr Carl sagan discusses the need for

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Answered by alka172017

1

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hope it help you

Explanation:

Carl Edward Sagan (/ˈseɪɡən/; November 9, 1934 – December 20, 1996) was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, author, and science communicator. ... Sagan published more than 600 scientific papers and articles and was author, co-author or editor of more than 20 books.

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