Trinity College Dublin Jan 20 2026 Scientists have found that blocking microglia (specialist immune cells in the brain) prevents infant forgetting ("infantile amnesia") and improves memory in mice, suggesting that microglia may actively manage memory formation and dictate what, and when, we forget. Infants of many species from mouse to human rapidly forget things that happen to them-a phenomenon called infantile amnesia -- but until now we have known little about how this happens. The new