Do we have bigger brains than dolphins? Does your dog remember where it buried its bone? Why don't sheep laugh or gorillas lie? Why do we remember faces but not names? In 21 short walks around the human brain, acclaimed psychologist Michael Corballis answers these and other questions by introducing us to what we've learned about the human mind in the last fifty years. Corballis leads us through behavioural experiments and neuroscience, cognitive theory and Darwinian evolution, puncturing a few hot-air balloons ("You only use 10 per cent of your brain!" "Unleash the creativity of your right brain!") along the way. At one time or another, we've all wished that we could get inside someone else's head. Here's how.