Who explored the phenomenon of insight in animals?

The phenomenon of insight in animals has been notably explored by psychologist Wolfgang Köhler, particularly through his experiments with chimpanzees in the 1920s. Köhler observed that these primates demonstrated problem-solving abilities that indicated sudden understanding rather than trial-and-error learning. His work suggested that animals, like humans, can experience moments of insight when faced with challenges, highlighting cognitive processes in non-human species.