Which nerves connect our senses with our cerebral cortex? How do our brains become conscious of sensory stimuli? And how does that ultimately result in an understanding of what is happening around us? These are the kind of questions that Serge Dumoulin is engaged in, and which put him on the trail of a congenital abacus in our brain. Serge Dumoulin is a Social Sciences laureate of the Ammodo KNAW Award 2015.