My father experienced an episode of short term memory loss yesterday. He asked about a box on the counter, I told him what it was then he turned away and within seconds asked again. This occurred nearly 4 times. In the same time frame, he could not remember putting groceries away or eating a yogurt.The entire moment of memory loss lasted about 10-20 minutes then seemed to pass. Later when we discussed it, he had no recollection of the conversation or the memory loss. In order to convince him that he ate a yogurt, we found the empty container in the trash to show him. He will be 68 and this is the first time something like this has happened.