Michael Mosley traces our development from birth to adulthood, and reveals that the human brain is so sophisticated it takes more than twenty years to mature. We see how new-born Phoebe makes sense of the world, and how one-year-old Angelina copes with just half a functioning brain. Michael shows his own teenagers remarkable scans which reveal just how many brain connections we lose between the ages of 11 and 20. This remodelling is an essential part of growing up, and helps explain teen behaviour and their tendency to take risks.

Originally released by BBC Worldwide Learning, 2011. Streaming video file encoded with permission for digital streaming by Infobase on November 21, 2019.