Can our experiences be passed down biologically to our children and grandchildren? Quite a thought given for a long time now the orthodoxy has been that our traits are transmitted through our genes meaning that how your father or mother behaves can’t affect your biology. However, this evolutionary theory may itself be evolving. In one study, mice who were psychologically stressed, seemed to pass on this stress to their descendants. It’s controversial, but Professor Eva Jablonka argues, that the impact of what happens to us in life could be felt by future generations. Presented by David Edmonds (Image: Illustration of DNA, Credit: Shutterstock)