Spacetime Soccer
![Spacetime Soccer, known outside the United States as '4D Football' is a now-defunct sport. Infamous for referee decisions hinging on inconsistent definitions of simultaneity, it is also known for the disappearance of many top players during... [more]](/_next/image?url=https%3A%2F%2Fimgs.xkcd.com%2Fcomics%2Fspacetime_soccer.png&w=3840&q=75)
Spacetime Soccer, known outside the United States as '4D Football' is a now-defunct sport. Infamous for referee decisions hinging on inconsistent definitions of simultaneity, it is also known for the disappearance of many top players during... [more]