Quite surprisingly, our research shows that brain areas thought to be dedicated exclusively to a certain sensory input (e.g. vision), can use inputs from other sensory modalities (e.g. sounds and touch) to develop their typical functional specialization. Moreover, this specialization can suddenly occur in the adult brain - even in adults that were never exposed to the relevant, supposedly critical, sensory input. Take for example a congenitally blind person, who never saw a human face in his life. In his brain, the area usually dedicated to processing faces did not develop in early childhood, as it was completely deprived of visual input. We demonstrated that if you teach a congenitally blind person to “see” faces with sounds, the face processing area in his brain will become active! Furthermore, tones of a higher pitch denote higher locations, whereas their ordering in time corresponds to their respective positioning from left to right. We scanned the brain of our most proficient blind from birth user (MaMe) using functional magnetic resonance imaging, before the training and after he had successfully learned to interpret soundscapes. After learning, his brain was shown to be activated not only in the hearing parts of the brain but also in the seeing parts of his brain. Not only that, the activation followed a pattern of topographical maps – the highly ordered manner in which external stimuli are mapped in the sensory systems of the human brain. For example, in the visual cortex of sighted people, neighboring locations are "mapped" onto adjacent neurons, whereas places at a great distance from one another are represented by brain areas that are further apart. MaMe's scans revealed topographic maps tuned to pitch and time – or even to both concurrently – that had not existed in his brain before he'd started the training. For instance, tones of a similar pitch were represented by adjacent brain areas, whereas those of radically different pitches – by brain areas that were distant from one another. This is the first time sensory topographic maps have been shown to emerge in an adult human brain. These findings suggest that the brain's sensory regions can be adapted to processing novel sensory experiences. In fact, past studies by other labs (e.g. Sur lab at MIT) had shown in newborn laboratory animals that it's possible to "move" the vision function to the brain's hearing region by surgically guiding nerve fibers from the visual cortex to the auditory one. This new study supplies a proof of concept that a similar transition can be done in a noninvasive manner, and in an adult, rather than infant, brain. So critical periods are not permanent cut-off points for developing new sensory abilities – rather, in a way, we can give the brain a second chance at any point in life. We suggest that EyeMusic can teach people to develop an ability that is similar to that of bats and dolphins: extracting information about geometric shapes from complex sounds. A major difference, of course, is that the animals had developed this natural ability in the course of hundreds of thousands years of evolution, whereas in the lab, it can be acquired after a relatively short training. So with the right technology, one can induce a speeded-up evolution of sorts in the sensory brain. These exciting findings led us to propose a new theory of brain plasticity: the Reversible Plasticity Gradient. We suggest that with the right interventions, we can stop the general decline of brain plasticity over the lifespan, and regnite brain plasticity at adulthood. We now further examine how transforming one sensory input into another, with the aid of wearable devices we develop, can help restore brain functionality of adults. Moreover, by providing the brain multisensory input (for example, matching sound and vibration) we can help improve the rehabilitation of patients with a wide variety of sensory deprivations. Another goal of our research is to ignite the brain plasticity of normal healthy adults, and help them develop “new senses”. To achieve this ambitious, mind boggling, nearly Sci-Fi goal, we develop new sensory experiences never actually experienced before by any person, and deliver them to our subjects’ existing senses with purposely designed wearable devices. With sufficient training, we expect our subjects’ brains to adapt and seamlessly process these new experiences, to create additional “senses”.