This rare condition also known as highly superior autobiographical memory (HSAM) causes people to remember just about everything that has occurred in their life. This includes every conversation and emotion ever experienced as well as every person encountered, regardless of how insignificant or minute.
The cause of Hyperthymesia is still unknown but some researchers believe that it is genetic while others think it may be molecular.
There are only 61 people worldwide who have been identified as having hyperthymesia, one of which is actress Marilu Henner, best known for her work on the show Taxi. Watch this TV interview where she speaks about her experience living with the disorder and recalls everything she did on January 17th 1974.
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