Professor Chris Speed, Chair of Design Informatics, presents the fourth lecture in the 2014 Our Changing World series, entitled "Dancing with Data". This talk speculates upon a future time in which objects will begin to interact with us in different ways. Such an enquiry is part of what is being described as an Internet of Things. The term, Internet of Things, refers to the technical and cultural shift that is anticipated as society moves to a ubiquitous form of computing in which every device is on, and every physical object is connected in some way to the Internet. The focus of the talk is to anticipate a time when the scale of data that becomes associated with physical objects is so great that it allows unforeseen patterns and opportunities to be identified. Recorded on 14 October 2014 at the University of Edinburgh's Appleton Tower.