The Brain at Every Stage of Life

Every minute, in the first few months of life, we generate between two hundred fifty thousand and five hundred thousand new brain cells. But it turns out that most of our brain growth early in life isn't actually the development of new brain cells, but the connections between cells. By the time we're three years old, we have a thousand trillion connections between ourcells. Our experiences shape how our brain develops, but so do our genetics, hormones and even what we eat.