On Friday, April 27th the "Long Night of Science" took place in Austria from 4:00 p.m. to 12 p.m. Research institutions in Lower Austria provided an insight into their research work. More than 200 people visited the Bundesamt für Wasserwirtschaft in Petzenkirchen where the WasserCluster Lunz presented current research projects. In three stations, visitors learned about nutrient cycling in aquatic ecosystems, lipids in food chains, and aquatic organisms.