The winning entry of Nikon’s prestigious Small World In Motion contest has come under fresh scrutiny after experts accused the footage of using generative AI to create microscopic imagery.
Dr Ning Xu, a researcher at Tsinghua University, submitted a short video believed to show the motion of hair‑like cilia inside a child’s airway. Xu says the clip was captured with a microscope and then processed with standard colour‑enhancement techniques, which are allowed in the contest.
However, other scientists claim the video contains shapes and movements that do not match normal cell behaviour, and note that a watermark typical of AI‑generated images appears in some frames. Harris, a PhD student at UT Southwestern Medical Centre, suggested the source could be a footprint of AI manipulation.
Edward Phelps, associate professor at Florida University, commented that certain structures in the video “pop in and out of existence” and that the cilia “appear from nowhere”. Two former judges echoed that the image “doesn’t look real”.
In response, Nikon says the entry is “respectfully complying” with its investigation and that no contest rules were broken. The company has received technical documentation from Xu and promises an update soon.
Dr Patrick Hickey, who placed fifth in the 2026 Small World competition, emphasized that the award carries more than a $3,000 prize; it is “a recognition for the dedication of time spent under a microscope”. He added that it would be unfair to other entrants if a winning video had been unfairly altered.
The debate underscores the growing tension between AI‑assisted image enhancement and the integrity expectations of scientific competitions.
