Five extraordinary Americans […] can remember nearly every single moment of their lives.

Scientists hope that understanding their ability to recall absolutely everything will give new insights into memory loss and conditions such as Alzheimer’s.

[…] New York-based violinist, Louise Owen, says she can remember every day since she was 11 years old.

The 37-year-old said: ‘For me, I will often see a calendar in my head, and it’s usually a month at a time. When I hear the date, it’s like my brain immediately goes to a position on a calendar and once I locate it, I see what happened instantly. […] It’s almost as automatic as if you say, ‘What’s your name’ or ‘Where do you live?’ As soon as you say that date, I’m instantly there, I know how I felt, I know what happened that day. It’s as if it happened five minutes ago, as opposed to 22 years ago. It makes me want to live my life with much more intensity, connection and compassion.’

[…] The first person ever identified with this ability is Jill Price. She declined to appear on the show saying she is haunted by her constant memories.

[…] Dr James McGaugh, who has studied the condition, said: ‘It could be a new chapter. These people come and display a kind of memory we’ve never seen before, and we have to say, “What is that about?’ […] We’re going to take a look and see if we can figure that out. And it could be very important.’