One year after the birth of the world’s first two cloned primates , a team in China has used CRISPR gene editing and cloning to create monkeys that show some symptoms of depression and schizophrenia . While some researchers have praised the work’s potential for helping us understand psychiatric disorders in humans, others have raised ethical concerns.

Lead scientist Hung-Chun Chang, of the Institute of Neuroscience in Shanghai, told New Scientist about how he hopes …