Tonight's second episode of Twins, focuses on how the differences between identical twins can help scientists understand what makes us who we are. Through personal stories, Twins looks at aspects of health and lifestyle that affect us all: obesity, ageing and the fight against killer diseases including cancer. We meet identical twins Mark and John who are helping scientists to explore the possible genetic basis of sexuality; they may be genetic clones but John is gay and Mark is straight and scientists are eager to try and understand why.
This episode explores what can give brains a boost. In America, Angela tries out a new treatment that's proven to help memory and concentration. Plus Chris discovers the best exercise we can do for our brains.
We all think we know what ageing is, but it's actually surprisingly difficult to pin down. In this program, a 70-year old fashion model and her 17-year old granddaughter take part in scientific test to see whether it is possible to distinguish between them. The results give an insight into what contemporary science can tell us about what happens when we age at the molecular, genetic, cellular, physiological and psychological level.
The Brain That Changes Itself is based on the best-selling book by Toronto psychiatrist and researcher Dr Norman Doidge, and presents a strong case for reconsidering how we view the human mind. Dr Norman Doidge travels across North America to meet some of the pioneering researchers who made revolutionary discoveries about the plasticity of the human brain.