A 2008 study found that lots of top runners and athletes possess the mutation.7.Perfect memory recall Content not available Actress Marilu Henner explains what it’s like to have hyperthymesia.The brainiac is a troupe in superhero lore that we never tire of.In real life, there are those who remember every detail of every day they’ve ever lived.Know what you ate for breakfast on this date exactly ten years ago?What was in the news?Who did you speak to?What did you do?Those with hyperthymesia can tell you everything.Basically, it can be explained as having a super memory or an autobiographical one.So far, there are 25 confirmed cases.Actress Marilu Henner from the ’70s sitcom Taxi, is one.Subscribe for counterintuitive, surprising, and impactful stories delivered to your inbox every Thursday Notice: JavaScript is required for this content.Although it’s assumed that there’s a genetic basis, so far no one has nailed it down.There are certain neurological phenomena that come with the condition, however.