A new study has shed light on what truly makes us intelligent, challenging the way we define intelligence in both humans and artificial intelligence. The researchers argue that intelligence is not just about being good at solving problems or achieving goals, but rather about being able to create and improve internal mental structures that allow us to think critically and make predictions. This "explanatory adaptation" capacity is what sets intelligent beings apart from those that simply adapt or learn through experience. The study's framework provides a new understanding of intelligence, linking it to our ability to think physically and make sense of the world, and distinguishes it from ordinary forms of adaptation.