Memory and forgetting are two complementary faces of the same biological process which profoundly affect and direct our behaviour and the sense of our individuality. Although forgetting has generally a negative connotation, often associated with pathological states and/ or aging, it is a daily processes of our life allowing us to select from billions of experiences those that are the most relevant for our personal history and our culture. “Not everything that we learn is useful, so the brain needs a mechanism to prevent itself being burdened by unhelpful details.” (Alcino J. Silva, Sheena A. Josselyn, The Molecules of Forgetfulness, 2002).