America and China should cooperate in space. Although the United States can no longer take its extraterrestrial dominance for granted, it remains the leading player, while China’s space capabilities are growing fast. Most important, both countries, along with the rest of the world, would benefit from a set of clear rules governing the exploration and commercialisation of space. China made history in 2019 by becoming the first country to land a probe on the far side of the moon. It continues to notch up impressive achievements, most recently its Chang’e-5 mission to retrieve lunar samples. Former US President Donald Trump also took an active interest in space, announcing that America would return astronauts to the moon by 2024 and creating the Space Force as the newest branch of the US military.