author: Anya Nova Metcalfe, Anne Bowser, Daniel Dörler, Luigi Ceccaroni, Mordechai Haklay, Caren Cooper, Christopher Kyba, Jessie Oliver, Andrea Sforzi, M V Eitzel, Ruth Duerr, Arika Virapongse, Qijun Jiang, Martin Thiel, Chris Santos-Lang, Florian Heigl