A session at the British Association’s annual meeting in September, which this year is being held in Dublin, is devoted to a debate on the topic “Should we enhance ourselves: does nanotechnology have limits”. The debate, which is between 7 pm and 9 pm on Tuesday 6 September, has been put together by Donald Bruce, the Director of the Church of Scotland’s Science, Religion and Technology Project. The speakers are myself, Donald, and Paul Galvin, teamleader for Nanobiotechnology at the Tyndall National Institute in Cork.