The human brain is so sophisticated it takes more than 20 years to mature, making brain remodeling an essential part of growing up, as this program shows. Viewers find out how a newborn baby makes sense of the world—and meet a 1-year-old who copes with only half a functioning brain, Moken “sea gypsy” children who train themselves to see clearly underwater, a Vietnamese girl who speaks 11 different languages, and a 13-year-old stock car racer who proves that teenagers like to take risks. The video also looks at scans that display just how many brain connections are lost between the ages of 11 and 20.

A BBC Production.