Museum voluntary worker Theresa Stiller looks at a mountain bike by Leipzig bicycle manufacturers Rotor-Bikes during a pre-inspection at the Grassi Museum of Applied Art in Leipzig, Germany, 20 June 2017. The exhibition "Bikes! Re-inventing the bicycle" encompasses about 70 stylish bikes - from balance bicycles for children to fat bikes with wide tyres all the way to race bikes with the most innovative technologies. The show was prompted by the question, how should and could urban mobility look like in the future. The exhibition runs between 22 June to 01 October 2017. Photo: Hendrik Schmidt/dpa-Zentralbild/dpa