“The winner of the Nikon Small World in Motion competition is under investigation,” writes the photography news site PetaPixel , “after scientists accused Dr Ning Xu of using AI in his video.” The Nikon competition is about showcasing the beauty, complexity, and artistry of the microscopic world. The entries are abstract, often baffling to laypeople. But when Dr Xu was announced as the winner last month, members of the scientific community began to cry foul.