Talk by Professor Helen Quinn Professor of Physics at Standford University, Member of the National Acadamy of Sciences, Education and Public Outreach Manager at Standford Linear Accelerator Center.

This talk uses the history of understandings about gravity as a template for talking about how science works. It shows how our understanding is driven forward by the interweaving of threads that arise in observations and in theory building. Dr Quinn stresses the importance of seeking consistent interpretations of apparently inconsistent ideas or observations as a key to progress in science.