Max Planck's scientific legacy suffered an odd setback when Naturwissenschaft journal quietly retracted two of his 1940s papers. Physics historians Yves Gingras and Mahdi Khelfaoui discovered the papers had vanished entirely from the digital archive, replaced by blank pages citing "article violation." The retraction puzzled researchers since Planck never faced scientific misconduct allegations.

Gingras stumbled upon the retractions while browsing Retraction Watch, shocked to see a Nobel laureate's name. Editor Suzanne Scarlata admitted she was unaware of the removals until contacted by Science reporter Sam Kean, calling it "crazy" and likely algorithmic error. The papers, now in public domain, explored philosophical aspects of scientific knowledge rather than containing fraudulent research.

The historians traced the retractions to Springer Nature's 2005 digitization efforts, coinciding with electronic publishing expansion. They believe a "cataloguing ambiguity" triggered the removal - two separate papers by different authors shared identical titles in the same journal. This confusion likely flagged Planck's 1940 paper "Natural Science and the Real External World" as duplicate content.

Modern publishing standards around duplicate publication didn't exist in the early 20th century when scientific communication prioritized broad dissemination. Applying today's copyright-sensitive algorithms to historical texts risks distorting the scholarly record. Gingras demands restoration: "Intellectually, it's not acceptable" to erase these papers from accessible archives.