A glimpse of what it will be like to play sports in a hotter world


When Roger Federer played at the US Open this week, his tennis match took place in temperatures that exceeded 30°C (86°F). He lost—the first time the 37-year-old has been beaten by a player ranked outside of the top 50 at the event. “You just keep on sweating more and more and more and more as the match goes on,” Federer said. “You lose energy as it goes by. At some point, also, I was just happy that the match was over, I guess.” [Read More]