The Horizon explores the secrets of longevity, health, and a happy life. It has been proven that a period of time you can't remember - the nine months you spent in the womb - may have a more lasting impact on your lifestyle or genes today. It is one of the most powerful and provocative new ideas in human science, founded by British scientist Professor David Buck. His theory has inspired a research field that reveals how our time in the womb affects your health, personality, and even the lives of children.