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The human brain generates 1,400 new neurons per day, but their function had until now remained unknown.
Sometimes it can feel every day is Groundhog Day: you wake up, go to work, see the same people as the day before, and come home again. And yet, you experience each day as a completely new event, fully aware that you are living it for the first time. Exactly how the brain distinguishes between apparently similar contexts without mixing them up has perplexed scientists for some time, but new evidence suggests that “newborn” brain cells may hold the answer.