It is well known that our memory deteriorates as we get older, with short term memory deteriorating faring much worse than long term memory. Based on my own experience, I suspect the problem is that by the time people get to be my age and older, we have so much information stuffed in our heads that, rather than losing information, it simply becomes harder for our brains to find specific pieces of information. Long term memory does not deteriorate as much, and I suspect that is because when we were younger, our brains had much more available capacity. As we get older and our brain gets fuller, it also has a harder time finding places to store new information. I was at a wake Friday night for a working colleague. Someone mentioned a woman that we used to work with, but no one could remember her last name. on Sunday at 03:00 A.M., I remembered her last name.