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"Virtually nobody has memories from very early childhood - but it's not because we don't retain information as young children. Rather, it may be because at that age, our brains don't yet function in a way that bundles information into the complex neural patterns that we know as memories. It's clear that young children do remember facts in the moment - such as who their parents are, or that one must say "please" before mom will give you candy. This is called "semantic memory." Until sometime between the ages two and four, however, children lack "episodic memory" -- memory regarding the details of a specific event. Such memories are stored in several parts of the brain's surface, or "cortex." For example, memory of sound is processed in the auditory cortexes, on the sides of the brain, while visual memory is managed by the visual cortex, at the back. A region of the brain called the hippocampus ties all the scattered pieces together. "