The Universum is an interactive science museum on the university campus north of the Altstadt, housed in a dramatically shaped building clad in stainless steel scales. The permanent exhibition covers humanity, the earth, and the cosmos across three sections, with hands-on experiments designed for adults as much as for children.
It is a good half-day destination for visitors who have covered the Altstadt, and especially worthwhile when travelling with children. Reachable by tram from the centre.