Professor of Genetic Epidemiology, Tim Spector combines his scientific knowledge and research to answer this question, and many more, in his new book.

Tim Spector argues that we are not just skin and bones controlled by genes but minds and bodies made of plastic, and this plastic is dynamic, slowly changing shape and evolving, and nothing is completely genetically hard-wired or pre-ordained.

Click Here to listen to a radio broadcast Tim made whilst on a recent visit to Australia.