Neuroscientists are beginning to explore techniques that could erase bad memories from our minds.
The implications of wiping away a chronic fear, a traumatic loss or even a bad habit are being debated at a conference in London today.
Dr Anders Sandberg, neuroscientist and philosopher from the Future of Humanity Institute at Oxford University, is one of the speakers.
Dr Emily Holmes is a senior research fellow and clinical psychologist from Oxford University's Department of Psychiatry.
The BBC's Julian Marshall begins by asking Dr Sandberg how close scientists are to being able to remove memories.
First broadcast 25 March 2010