@CNN: After age 13, no new brain cells are created in a brain region linked to learning, according to a new study https://t.co/h3FfHauXpr https://t.co/rvNQWCkwJJ

@CNN: After age 13, no new brain cells are created in a brain region linked to learning, according to a new study https://t.co/h3FfHauXpr https://t.co/rvNQWCkwJJ