Bing Su, a Chinese geneticist at the state-run Kunming Institute of Zoology, recently inserted the human MCPH1 gene, which develops the brain, into a monkey. The insertion could make that animal’s intelligence more human than that of lower primates. Su’s next experiment is inserting into monkeys the SRGAP2C gene, related to human intelligence, and the FOXP2 gene, connected to language skills.