Why Can Nobody Remember Being a Baby?

Your first few years were extraordinarily busy. You learned to recognise faces, to sit up, to walk, to understand hundreds of words and to say quite a few of them. You tasted bananas for the first time, met the family cat and presumably had some very strong opinions about bath time. And yet, if you try to remember any of it, there is nothing there. The earliest memory most adults can find comes from around the age of three or four, and everything before that is a blank.

This gap has a name: childhood amnesia, also called infantile amnesia. It was first formally described by psychologists at the end of the nineteenth century. Around 1900, a survey of people's earliest recollections found that the average first memory came from the age of about three years and one month, and modern studies still put it at roughly three to four. A few events, such as the birth of a brother or sister or a stay in hospital, can sometimes be recalled from around the age of two.

The puzzle becomes stranger when you look at children. Young children can remember events from before they were three, and research suggests that they can recall happenings from before the age of two with some accuracy. But as they grow, those early memories fade. By about eleven, children tend to show the same childhood amnesia as young adults. So the memories were there once, and then something happened to them.

For a long time, many scientists thought babies simply could not store specific memories, because the hippocampus, a part of the brain vital for memories of events, was too immature. In 2025, researchers at Yale University tested that idea. They scanned the brains of 26 awake infants aged from four months to two years while showing them pictures of faces, objects and scenes, and later showed each picture again next to a new one.

Babies tend to look longer at something they recognise. The team found that when a baby's hippocampus was more active on first seeing a picture, the baby looked longer at that picture when it came back. The effect was strongest in infants over a year old. In other words, babies do seem to lay down memories of specific things. Which raises the real question: if the memories are made, where do they go?

One possibility is that they are never moved into long-term storage and simply fade. Another is that they are still stored but become impossible to reach, like files whose addresses have been lost. Studies in young rats point towards the second idea. Infant rats forget faster than older ones, but in one study a single reminder before a test was enough to reduce the forgetting, suggesting the memory had not vanished, only become hard to retrieve. The Yale researchers suspect something similar happens in people.

Culture and conversation seem to play a part too. People from families and cultures that talk a great deal about shared memories and the past tend to report earlier first memories, and in one study Māori adults in New Zealand reported especially early ones. So your first years may not be erased at all. They may simply be in a room your grown-up mind no longer has the key to.