The winning entry of Nikon’s annual Small World In Motion contest is now under scrutiny. The video, submitted by Dr. Ning Xu from Tsinghua University, shows miniature, hair‑like cilia moving inside the airway of a child with a rare condition. While microscopic imaging can be color‑enhanced, the clip was alleged to contain unnatural shapes and movements.
Xu has not answered direct inquiries but posted online denying any rule violations. He said the AI used in the entry was limited to differentiating grayscale features in the reconstruction, not generating the biological structures themselves. The enhancement, however, is common in microscopy and permitted by Nikon.
Critics point out that the cilia appear too large and that some structures seem to pop in and out of existence—behaviours not typical of real cells. Edward Phelps, an associate professor at Florida University, remarked that the footage makes the cilia seem to appear “from nowhere.” A former judge added that a watermark reminiscent of AI generation was visible in the source image.
Responding, Nikon stated that Dr. Xu was “respectfully complying” with the investigation and had supplied extra technical documentation. The company maintains that no contest rule was broken, but promised an update once all analyses finish.
For participants, a Small World prize is more than the £2,250 cash reward; it is recognition in a field that blends science and art. Dr. Patrick Hickey, who finished fifth last year, stressed that if the video were found to be fabricated, it would be unfair to others who competed honestly.
