Neuroscientists have thoroughly mapped the touch, visual and auditory regions of the brain's cortex, but how does this sensory information get processed into our perception of the world? Researchers have for the first time reconstructed the spatial map a mouse creates with its whiskers, and found evidence that layers 2 and 3 of the somatosensory cortex integrate the discret inputs from each whisker to create a smooth map of the surrounding world.