In 2008, Andrea Branzi has taken part in the competition organized by the French President Sarkozy to analyse a possible future for Paris. The Italian architect proposed the introduction of 50,000 sacred cows and 30,000 free monkeys in the parks and avenues of Paris. "Our idea was to move towards a less anthropocentric metropolis, that would offer cosmic hospitality, open to biological diversity in the city" said Branzi during our interview in his studio in Milan where we met to talk together about this project. Today Earth is experiencing a huge decline in its animal population. Scientists call it the "sixth mass extinction" because during the last century more than 50% of the animals have disappeared. Is a new coexistence between human and wilderness really possible? How can we define a possible coexistence between animals and humans in the urban context?