Amazing Brain!

The human brain is an amazing thing!
Some years ago scientists thought when people were born their brains had 100 billion neurons and during life some of these neurons die and no new neurons would be made then people die with about 70 billion neurons. But now a days scientists know that the brain can generate new neurons specially when the person does aerobic exercices(like running and swimming) that stimulate the production of proteins in the brain, it can help people have a better memory and learn faster.