'Science and technology… at the fairground? The fair, that’s mostly fun, right?' When I tell friends and family about my research, this is a common reaction. And yes, science and technology did in fact play an important role at the fairground in the nineteenth century. Let me take you on a journey to times when there were not only merry-go-rounds and slot machines at the funfair, but science and technology were presented to the public as a great spectacle. About 150 years ago, the fairground was indeed a place where people gathered to have fun – just like today – but also to meet each other,…