Freshly cut grass, rain falling on sun-baked tarmac, the cologne of your first loveā¦ we all have smells that stir up special, personal memories. For me, the smell of wood smoke evokes memories of camping as a child. A close friend told me that, for him, even the faintest whiff of a burning mosquito coil reminds him of living in Africa when he was five. Smelling is the most primitive of all our abilities and is the first sense we use from the moment we are born. Yet for people whose faculties are failing with age, an aroma can be the key to unlocking memories long forgotten. Read more