The Download: AI's gaming prowess, and calculating methane emissions

The news: A new AI agent from Google DeepMind can play different games, including ones it has never seen before such as Goat Simulator 3, a fun action game with exaggerated physics. Unlike earlier game-playing AI systems, which mastered only one game or could only follow single goals or commands, this new agent is able to play a variety of different games, including Valheim and No Man's Sky. How they did it: Researchers were able to get it to follow text commands to play seven different games and move around in three different 3D research environments. They trained it on lots of examples of humans playing video games, alongside keyboard and mouse input and annotations of what the players did. Then they used an AI technique called imitation learning to teach the agent to play games as humans would.