The title of this issue of Domus is "Playtime's over" and in its editorial Winy Maas wonders how humanity and design must evolve to face the changes of the planet. Starting with the climatic change, the protagonist of the cover story. To ski you have to go further north, higher in altitude. Winter sports and overheating: how do territories and economies change? 

Meanwhile, the fauna evolves to adapt to the urban context, where more than half of the global human population lives, but also 20% of that of birds. Menno Schilthuizen tells the story of a city made up of a mosaic of tiny ecosystems and more and more habitats in their own right, where a new nature is evolving very rapidly.  

Architecture. Two European capitals that have been able to face the new challenges thanks to the great work of their mayors are the protagonists of this issue: Madrid and Paris. Of the latter we analyze some accessible housing projects and more generally how the traditional forms of living leave room for experimental models and more flexible and sustainable types, with less consumption and more reuse, recycling and recovery.  

“Please, let's dream” is the title of Winy Maas's interview with Manuela Carmena, Mayor of Madrid, a city of tolerance increasingly visited, a reborn metropolis in which great importance is given to children, greenery and new technologies. Critic Ariadna Cantis explains how, 13 years after the creation of the Freshmadrid platform and after the crisis, it is time to return to mapping the emerging practices of the Spanish capital.  

Eline Strijkers and Duzan Doepel talk about their idea of a city of the future in which the values of a circular and inclusive society will dominate. 

With their plans for their city, some architects have radically defined its image. Let's analyse 4 examples: Antonio Palacios in Madrid, Hugh Maaskant in Rotterdam, Gio Ponti in Milan and Herzog & de Meuron in Basel. 

Design. The CEO of Dutch Design Week in Eindhoven tells how design can change the world for the better. From Design Week in Milan, instead, we selected five projects as an example of what it means to think about the urban aspects of product design: "Everything is urban", even in projects on a smaller scale than architecture.  

The city is a grandstand: just as the Grand Prix transforms Monte Carlo into a city circuit every year and the terraces of the houses into privileged grandstands on the most important car race in the world.