UFO UAP Wiki — a reference wiki, not a verdict. Read with skepticism. October 5, 2026

Philip Klass

Aviation journalist and engineer who became ufology’s most prominent and prolific skeptical investigator
Philip Klass
Philip Klass
Photo by Robert Sheaffer, CC BY-SA 3.0
Born1919
Died2005
NationalityUnited States
CategorySkeptic / researcher
Known for
RolesSenior editor, Aviation Week & Space Technology; founder, UFO Skeptics newsletter
StatusMainstream aviation-journalism credentials

Philip Klass was an American electrical engineer and longtime senior editor at Aviation Week & Space Technology magazine who became the most prominent and prolific skeptical investigator of UFO claims in the United States from the 1960s through the 1990s, offering conventional explanations for numerous high-profile cases.

Assessment

Klass’s aviation-industry expertise lent particular technical weight to his skeptical analyses of aircraft-related sightings, though his sometimes combative style and willingness to challenge witness credibility directly drew criticism from ufologists including Stanton Friedman, with whom he engaged in decades of public debate.

[1]

See also

Further reading

References

  1. ^ Klass, P. J. (1974). UFOs Explained.
Categories: United States Skeptic

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