On 15 September 1967, the journal Science publishes an article by William Markowitz entitled “The Physics and Metaphysics of Unidentified Flying Objects” arguing that UFOs could not be extraterrestrial, alleging that interstellar rockets are impractical.
Web Resources
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Book References
Complete text of article reprinted in “The Quest For Extraterrestrial Life : A Book of Readings” (1980) (edited by Donald Goldsmith) (available on Amazon USA and on Amazon UK) at pages 255-261 (in Chapter 49) of the University Science Books hardback edition.
For discussion of the article by Markowitz see the following:
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Condon Report (“Scientific Study of Unidentified Flying Objects”, Edward U Condon (Director) and Daniel S Gillmor (Editor) (1969)) (available on Amazon USA and on Amazon UK) at page 37 (in Section 2 “Summary of the Study”, by Edward U Condon) of the uncorrected version submitted to the Air Force (with the same page numbering in the 3 volume paperbound edition distributed by the National Technical Information Service, US Department of Commerce) at page 27 of the Vision hardback edition (with the same page numbering in the Bantam paperback edition). The first of these editions has the same page numbering as the edition available free online at the following links: |
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Hill, Paul R in his “Unconventional Flying Objects : A Scientific Analysis” (1995) (available on Amazon USA and on Amazon UK) at page 90 (in Chapter 5) of the Hampton Roads softcover edition. |
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Jacobs, David Michael in his “The UFO Controversy in America” (1975) (available on Amazon USA and on Amazon UK) at pages 217-218 (in Chapter 8) of the |
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Maccabee, Bruce in Friedman, Stanton’s “Flying Saucers and Science : A Scientist Investigates the Mysteries of UFOs” (2008) (available on Amazon USA and on Amazon UK) at page 18 (in the Foreword) of the New Page softcover edition. |
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Salisbury, Frank in his “The Utah UFO Display: A Biologist’s Report” (1974) (available on Amazon USA and on Amazon UK) at pages 187-190 (in Chapter 7) of the Devin Adair hardback edition. |
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Schwarz, Berthold E in his “UFO Dynamics : Psychiatric and Psychic Aspects of the UFO Syndrome” (1983) (available on Amazon USA and on Amazon UK) at page 39 (in Chapter 1) of the 1988 revised Rainbow Books softcover edition. |
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Sheaffer, Robert in his “The UFO Verdict” (1980) (available on Amazon USA and on Amazon UK) at page 169 (in Chapter 17) of the Prometheus softback edition. |
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Sheaffer, Robert in his “UFO Sightings: The Evidence” (1998) (available on Amazon USA and on Amazon UK) at page 223 (in Chapter 16) of the Prometheus hardback edition. |
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Thompson, Richard in his “Alien Identities: Ancient Insights into Modern UFO Pheonemena” (1993) (available on Amazon USA and on Amazon UK) at pages 21-22 (in Chapter 1) of the GHP revised softcover edition. |
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Vallee, Jacques in his “Forbidden Science: Journals 1957-1969.” (1992) (available on Amazon USA and on Amazon UK) at page 316 (in the entry dated 1967.1013) of the North Atlantic Books hardback edition, at page 318 of the 1996 abridged Marlowe paperback edition. |
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Wright, Susan in her “UFO Headquarters” (1998) (available on Amazon USA and on Amazon UK) at page 191 (in Chapter 10) of the |
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Other Material
Markowitz, W., "The Physics and Metaphysics of Unidentified Flying Objects ", Science, Volume 157 (1967.0915), pages 1274-1279.