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Challenge of the universe: Student activities by Norman D. Anderson. Illustrated by Helmut Wimmer. Produced as a joint project of the National ... Administration

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143 pages, Paperback

Published January 1, 1962

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About the author

J. Allen Hynek

32 books70 followers
United States astronomer, professor, and ufologist

He is perhaps best remembered for his UFO research. Hynek acted as scientific adviser to UFO studies undertaken by the U.S. Air Force under three consecutive projects:

Project Sign (1947–1949),
Project Grudge (1949–1952), and
Project Blue Book (1952 to 1969).

For decades afterwards, he conducted his own independent UFO research, developing the Close Encounter classification system, and is widely considered the father of the concept of scientific analysis of both reports and, especially, trace evidence purportedly left by UFOs.

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