Next Saturday, October 3rd 2015, the entire city of Lausanne will meet at Place de la Riponne. They will discover the city in a way they have never imagined. Is the fountain of Place de la Riponne inhabited? Why there are fallows in city spaces? Is Lausanne a great place for living for Plants, insects and other little bugs? Activity done by L'Eprouvette - Lausanne University public laboratory.