Neuroscience is full of open questions. The most fundamental come down to space and time. What can place cells, grid cells and cognitive maps tell us about the evolutionary history from spatial navigation to abstract cognition? Do temporal dynamics between neural oscillations of different frequencies explain how information is structured in the brain? And are there species differences in how time is perceived? To find answers, or at least better questions, I am interviewing researchers in neuroscience, philosophy and physics. Twitter: https://twitter.com/akseli_ilmanen