Scientists at an unnamed corporate laboratory were randomly assigned a machine-learning tool.Credit: Eugenio Marongiu/GettyArtificial intelligence (AI) is becoming ubiquitous in applied research, but can it actually invent useful materials faster than humans can? It is still too early to tell, but a massive study suggests that it might.How close is AI to human-level intelligence?Aidan Toner-Rodgers, an economist at the Massachusetts Institute of Technology (MIT) in Cambridge, followed the deploy...