Australian Rebecca Sharrock can remember everything she's ever said, done or felt. She’s one of just 60 or so people in the world who’ve been diagnosed with Highly Superior Autobiographical Memory, or HSAM. Her condition’s been verified by researchers at the University of California Irvine. Not only can Rebecca recall what she was doing on any particular day, the memory is so strong that it’s like she’s there in that moment all over again. So does she think of her memory as a blessing or a curse? (Photo courtesy of Rebecca Sharrock.)