Your brain is capable of learning to multitask without your realizing it, according to a new study. It has long been thought that using your brain to work simultaneously on multiple things was impossible. That’s because problem-solving, logical planning and abstract thinking are all carried out by a key region of the brain known as the prefrontal cortex, which is notoriously inflexible. “It’s made to do one thing at a time, which is often a good thing,” said Maximilian Riesenhuber, a professor