Kinetic energy
A Jack-Russel terrier jumps on the installation Melt at Landscape Park Duisburg-Nord in Duisburg, Germany. Rejane Cantoni and Leonardo Crescenti present Melt — a 70 m-long-walk-in installation under one of the abandoned blast furnaces. It is an interactive installation that reacts to the movement of the visitors through its kinetic surface. The art festival "Ruhrtriennale" takes place in the Ruhr area. PHOTOS: AFP 

Floating display
A five-metre-tall, 15-metre-long inflatable sea turtle created by artist BJ Price is towed around the Sydney Harbour past the iconic Harbour Bridge and Opera House. It celebrates the opening of the world’s first undersea art exhibition at Sea Life Sydney Aquarium. The floating sculpture named the Alpha Turtle will be berthed at Cockle Bay next to Sea Life Sydney Aquarium announcing the opening the Undersea Art Exhibition. The exhibition is on till September 11 featuring a collection of BJ Price’s abstract paintings submerged in the underwater display tanks. 

Vikings hit back
Jan Bruun Jensen, expert of the National Museum of Denmark, builds a structure for the wreckage of the Roskilde 6 vessel from the Viking Age at the atrium of the Martin Gropius Bau museum in Berlin, where preparations are under way for the exhibition “The Vikings”. The ship, measuring 37 m in length, is the longest warship from this epoch ever to be found. The exhibition from September 10, 2014 to January 4, 2015 will feature warrior graves and weapons finds, grave goods for affluent women, archaeologically important settlement finds, as well as evidence of cultic and religious practices of historical value.