Why Do We Remember Childhood Events But Forget Yesterday?

Imagine your brain is like a hard drive in a computer. When you are a baby, the hard drive is still being built! Brain cells connect to each other every day, but they are not quite wired up properly yet.

Think of your memories as photos being put into a filing cabinet. When you are very young, the cabinet doors are loose. Every time something happens, like eating a cookie or meeting grandma, the brain tries to save that picture. But because the cabinet is wobbly, those old pictures often fall out before they can be labeled.

Another big reason is learning to speak. Babies understand more than they can say. As you learn words, your brain changes how it stores information. It switches from pictures and feelings to words. This switch wipes out some of the old picture memories. That is why we rarely remember being babies.

Most people have their first real memory around age three or four. Before that, they might know things, but they do not have a strong sense of self. Without knowing 'I am me', it is hard to save memories as 'mine'. So, the brain waits until you are older and your filing cabinet is sturdy enough to keep the treasures inside.