‘Superposition’ combines physics, art and history: the Institute of Physics asked an artist to design a work for the eastern ice well of the Canal Museum. The result refers to particle detectors, especially to neutrino detectors (which are in deep mines). On Thursdays, Saturdays, and Sundays until 20 October visitors can climb down into the ice well to see it for themselves; there are also pictures relayed from the ice well to the normal visiting area and to the web site. On 17 October the artist (Lyndall Phelps) and a physicist (Ben Still) will talk about the work (which they call ‘Covariance’). There are many more details here.