Rebecca Sharrock has a condition called Highly Superior Autobiographical Memory, which enables her to remember every day of her life in clear, intricate detail.
Rebecca Sharrock (L) with her mother Janet (R)

Most of us can remember what we had for breakfast this morning. But, if you tried, could you remember what you had for breakfast on this today a week ago? Or, even further back, on this date last year, or five years ago? Rebecca Sharrock does. She’s one of a very small group of people in the world — about 60 known cases — who have a rare condition known as highly superior autobiographical memory, or HSAM. People with HSAM remember an incredible amount of their past experiences. Why they do is still a mystery. 

Becky remembers—is unable to forget—all of her birthdays, emotional events and even dreams, and has been dating them since 2004 by crossing off each day in a calendar. 

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