Hümmler has been active in the German skeptics' group GWUP since 1990s.[1] He was a regional spokesman and convenor for the Frankfurt area.[3] He first became interested in skepticism after reading about the European Skeptics Congress.[7] For several years he was an editor of The Skeptiker magazine.[9] He now investigates pseudoscience claims mostly from the areas of pseudo-physics, business esoterics, conspiracy theories,[2][3] supernatural claims in martial arts,[2][3][6][9] alleged UFO encounters,[5][6][9] weather effects,[5][9] biological influence of radiation,[5] misuse of physics terminology in pseudoscience, especially in Quantum Theory and Theory of Relativity,[9] debunking free energy theories[9] and quantum healing[3].
Hümmler appears in media as a GWUP expert commenting on conspiracy theories, such as chemtrails.[3] In 2008 he investigated the abilities of Shaolin monks on the Galileo Mystery TV show.[3]
In a German Physik Journal, an official journal of the Deutsche Physikalische Gesellschaft, which is the world's largest organization of physicists, Hümmler wrote an article calling physicists to take a stand against the esoteric abuse of science.[10]
His first book, Relativer Quantenquark, was published in April 2017. It deals with pseudo-physical claims in esoterics and alternative medicine, but it also explains the basics of quantum mechanics and relativity.[11][12] As of July 2017, Hümmler is working on a new book.[7]
Hümmler is an author of the science blog quantenquark.com.[3] He was a speaker at the 17th European Skeptics Congress in Wrocław, Poland, where he presented a speech titled Relative Quantum Nonsense: Don't be Fooled by False Physics.[3]
Publications
Tachyonen: Schnelles Geld mit schnellen Teilchen – oder ohne? Ein missbrauchter Begriff der Physik (Tachions: Quick money from quick particles – or not? A misused physical concept.) Skeptiker 4/2002, p. 154, doc file[permanent dead link]
Tachyonen, Felder, Freie Energie – wie die Esoterik die Begriffe der Physik missbraucht (Tachions, fields, free energy – misused physical concepts) (lecture PDF notes)
Chemtrails – Zwischen Meteorologie und Verschwörungstheorie (Chemtrails between meteorology and conspiracy theory) Skeptiker 2/2006, pp. 48–55, PDF file
Das Geheimnis des Kung Fu (The secret of Kung-fu) Skeptiker 3/2006, pp. 112–120
Erdbebenmaschinen Das HAARP – Experiment und die Verschwörungstheoretiker (HAARP experiment and conspiracy theorists) Skeptiker 3/2011, pages 108 – 116
Books
Relativer Quantenquark. Kann die moderne Physik die Esoterik belegen? (Springer-Verlag Berlin Heidelberg, 2017) ISBN978-3662538289
Verschwörungsmythen. Wie wir mit verdrehten Fakten für dumm verkauft werden. (Hirzel, 2019) ISBN978-3777627809
with Ulrike Schiesser: Fakt und Vorurteil. Kommunikation mit Esoterikern, Fanatikern und Verschwörungsgläubigen. Springer Berlin 2021, ISBN978-3662632086
^ abcdefghij"autor". Relativer Quantenquark. Esoterik, Bullshit und Spekulatives unter dem Mäntelchen der modernen Physik. Archived from the original on June 13, 2018. Retrieved June 13, 2018.
^ abcdef"Who is Who Dr. Holm Hümmler" (in German). Gesellschaft zur Wissenschaftliche Untersuchung von Parawissenschaften e.V. Archived from the original on May 27, 2017. Retrieved July 18, 2017.
^ abcdef"Dr. Holm Hümmler". Skepkon. Die Konferenz für Wissenschaft und Kritisches Denken (in German). Gesellschaft zur wissenschaftlichen Untersuchung von Parawissenschaften. Archived from the original on July 19, 2017. Retrieved July 19, 2017.
^Hümmler, Holm Gero (2017). Relativer Quantenquark. Kann die moderne Physik die Esoterik belegen?. Springer-Verlag Berlin Heidelberg. ISBN978-3662538289.