One of the most exciting scientific discoveries of recent times is the finding that the adult human brain contains stem cells that can generate new brain cells throughout our life. This is revolutionary, with far-reaching implications for expanding our mind. Animal studies have unequivocally shown that stimulating environments and exercise increase the number of new brain cells. It follows then that we can generate new brain cells and expand our mind through mental and intellectual stimulation – reading, thinking, creating, doing cryptic crosswords, Sudoku, chess – and exercise. The idea that our brain inevitably shrinks with ageing is a myth that exists only in our minds. Keep your mind active and engage in a stimulating and challenging life, and stay fit – these are the vital ingredients for expanding your mind.