Why does life speed up as we get older? Why does the clock in your head sometimes move at a different speed from the one on the wall? Time rules our lives, but how much do we understand it? And is it possible to retrain our brains and improve our relationship with it? Drawing on the latest research from the fields of psychology, neuroscience, and biology, and using original research on the way memory shapes our understanding of time, the acclaimed writer and BBC broadcaster Claudia Hammond delves into the mysteries of time perception. Along the way, she introduces us to an extraordinary array of characters