Brain tree: why we replenish only some of our cells | Daniel Glaser

Many of the body’s cells regenerate - but not the brain’s, explains Daniel GlaserWe are being treated to a spectacular display of autumn colour this year, but it isn’t only trees that share this pattern for periodic shedding and regrowth. Our own skin cells, for example, are renewed every month or so, but we replenish less than 10% of our bone each year. Certain types of human cells do not seem to regenerate at all and this includes brain cells. With a few exceptions (such as t