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A prestigious scientific photography competition run by camera giant Nikon is reviewing its winning entry after researchers raised concerns that the video may have been created or altered using artificial intelligence. The controversy has cast a shadow over Small World In Motion, an annual contest that has celebrated the best in microscope-based photography and videography for the past 15 years.
The winning submission came from Dr Ning Xu, a researcher based at Tsinghua University in China. According to his entry, the short video shows hair-like cellular structures known as cilia beating inside the airways of a child suffering from a rare disease. Such footage, if genuine, would represent a striking example of the kind of intimate biological detail that the competition was designed to highlight.
However, the victory quickly drew scrutiny from fellow scientists who questioned whether the footage could have been produced through legitimate microscopic imaging alone. Several researchers took to social media to argue that the movement and appearance of the structures in the video did not match what would be expected from real cilia.
Dr Xu did not reply to requests from the BBC for comment. Nevertheless, he has publicly denied breaking any of the contest's rules. In a response posted beneath Nikon's announcement on LinkedIn, he defended his methods and insisted that the underlying scientific content of the video was authentic.
Specifically, Dr Xu stated that AI was not used to generate the experimental movie, the cilia themselves, or their motion. He acknowledged, however, that AI tools were employed to help distinguish and visualise features within reconstructed greyscale images. In his view, this use of technology remained within the boundaries set by the competition.
The video features artificially bright colours — a common and permitted technique in microscopy, usually achieved by applying stains and dyes directly to the sample before imaging. The rules of the contest explicitly prohibit the use of generative AI to create or produce content, and require that all entries be captured under a microscope.
Critics have focused on several specific anomalies. Edward Phelps, an associate professor at Florida University, commented on Nikon's social media post that some of the structures appeared to "pop in and out of existence," while the cilia seemed to "appear from nowhere." Such behaviour, he suggested, is inconsistent with genuine cellular activity.
Ian Donovan, a PhD student at UT Southwestern Medical Centre, added another layer of doubt by pointing out that the source image appeared to carry a distinctive watermark associated with AI-generated content. That observation, if accurate, would raise serious questions about the provenance of the underlying material.
The unease extended beyond the scientific community on social media. Two former judges of the competition also expressed concerns about whether the image was genuinely captured through a microscope. Their doubts carry particular weight given their familiarity with the standards and technical demands of the contest.
Nikon has indicated that Dr Xu is cooperating with its inquiry and has supplied additional technical documentation to support his entry. In a statement, the company said it currently sees no evidence that any rules were violated, but confirmed that an update would be issued soon as its review continues.
The outcome matters a great deal to those who take part. Dr Patrick Hickey, who finished fifth in the 2026 Small World contest, explained that the recognition associated with the award carries far more significance than the $3,000 prize. For researchers who spend long hours in darkened rooms peering through microscopes, he said, the chance to share their work with the public is immensely rewarding.
Dr Hickey also highlighted the artistic dimension of the field, describing an interesting fusion between science and art, and noting that many scientific images possess abstract and artistic qualities. He stressed, however, that fairness is essential, and that it would be unfair to other entrants if the winning video turned out to have been improperly altered with AI.
The dispute reflects a broader tension now facing photography and science communication competitions worldwide: as AI image and video tools become more accessible, judging panels must grapple with how to verify authenticity while still allowing legitimate computational techniques that have long been part of scientific imaging.
For the moment, Nikon is standing by its procedures, but the company's forthcoming update is likely to be closely watched by competitors, researchers, and observers alike. The case raises pressing questions about how prestigious scientific awards can maintain trust when the line between genuine microscopy and AI-assisted reconstruction is increasingly difficult to discern.
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