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Nikon disqualified the original first-place winner of its Small World in Motion microscopy video contest after determining the entry, depicting cilia in a child's airway, violated rules on generative AI use in post-processing. A new winner, Nguyen Nam Nhat of Vietnam, was named for a video of a roundworm and a single-celled Dileptus. The controversy highlights growing challenges for scientific and creative competitions in policing the use of generative AI tools, as organizers work to maintain trust in the authenticity of submitted imagery and research documentation.