You can discover a lot about scientific advances from taking a tour of a medical facility. Find out whether CHU Nancy is open to the public while you're in town.
To visit this health care institution, you'll need to find your way to Saint-Pierre - René II - Bonsecours. You'll find lots of other interesting attractions in the area, such as Place Stanislas, Musee des Beaux-arts, and Musee de l'Ecole de Nancy.