This week we take a closer look at people with brain abilities that appear superhuman. We speak with Craig Stark, Professor of Neurobiology and Behavior at the University of California Irvine, about hyperthymesia and people who possess an extremely detailed autobiographical memory. Then we talk with Jamie Ward, Professor of Cognitive Neuroscience at the University of Sussex, about synaesthesia, multi-sensory substitution, and people who see sounds, taste words, and hear colours.