The unconscious part of the human brain processes roughly 11 million pieces of information per second. Over a lifetime, that's a lot of information. So why do we remember some things and not others. And how can we somehow recall a piece of information that was buried down in the archives of our mind? We speak with Celia Harris, Vice Chancellor's Senior Research Fellow at The MARCS Institute for Brain, Behaviour and Development, to examine how memory works, why we make memories in the first place and how we access things that can help us in our daily lives, relationships and behaviour.