The x-change is an event where a panel of leading commentators come together to discuss a variety of science topics. The audience play a key role by asking questions, sharing their views and taking part in interactive voting.

It is an informal and lively event where the social and ethical issues of contemporary science are discussed.

The x-change at the BA Festival of Science is a lively discussion about each day's events at the festival, featuring speakers and a variety of entertainment.

Previous x-changes in the cafe bar at London's Dana Centre focused on a range of topics such as climate change, saviour siblings, space missions and pharmacogenetics.

In 2008, the x-change will travel once again to the Euroscience Open Forum, a multi-disciplinary science conference that aims to provide a platform for scientists and the public to exchange views.