Do you have a clear memory of where you placed your vehicle keys? Or, for that matter, where you've parked your vehicle. What was the name of the actor who played that role in that movie - did you know who he was? Memory lapses occur throughout the day, and if you're over a certain age, they may be a source of anxiety and concern. We wonder whether this is the beginning of the end of our civilization. Is dementia or Alzheimer's disease a long way off? Despite this, we are unconcerned with having remembered tens of thousands of words. We can vividly remember particular moments from our infancy in great detail. We recall the words of a popular song from many decades ago. Despite its many faults and contradictions, the recollection is really remarkable. These notes, which are based on a review of the most recent neuroscience research, examine the strength, frailties, and function of the brain's memory systems.