Explores brain power. It asks which are the experiences in the first year of life that can turn someone with the genes for genius into a failure, and someone less blessed into a success. As adults, roughly 70 percent of our brain power is inherited from our parents. But our intelligence isn't just down to our parents' genes. What happens to us in life from the moment we are conceived can make a difference. So how can the environment help to increase a child's intellectual potential?