Can you recall when the Boxer Rebellion occurred but forget where you left your car keys? Do you remember the name of the 13th president but have a hard time bringing a specific word to mind when you need it? You may be suffering from too much memory.

Research at the Columbia University Medical Center indicates that the growth of new neurons in the hippocampus, the part of the brain where learning and memory are seated, can actually cause you to experience more limited working, or short-term, memory.

Apparently, forgetting some information is essential to being able to access short-term memory. Storing too much information interferes with working memory. In experiments in which mice had the neurogenesis in the hippocampus blocked, they were better able to navigate a maze and locate food in the maze.

The researchers suggest that forgetting some older and useless information makes room for newer and useful information such as where your car is parked in a large lot.

But which information is useless, and is all older information just taking up storage space you could use for something newer and more immediate? It is said of Albert Einstein that he was often distracted and forgetful. He described his wild hairstyle as simply the result of doing nothing with it. But the man who reportedly never untied his shoes because he couldn’t remember to tie them again, was busy pondering the nature of the universe.

According to The Association for Distracted People, “distractedness actually reflects a high level of concentration (on something else)”.