Do you ever put something important in a "safe place" because you will totally remember where it is later and then later comes around and it's gone forever? Last summer on a backpacking trip I decided to store (hide) my SD card from my camera in a safe spot to make sure it didn't get smashed or wet in my bag. Once I got home I had no idea where I put it and after searching for a long time I gave up and assumed it lost to the wilderness. Last night while I was replacing the tips of my earbuds I found that SD card in the last place I would have thought to look in a pouch of my earbud case. Do you think humans will ever fully understand the brain?