Over the weekend, China hosted the inaugural Humanoid Robot Games, marking a new milestone in robotics and artificial intelligence. This unique event, held in an Olympic arena, saw the assembly of over 500 robots from 280 international teams.

Humanoid robots raced and punched their way through three days of a multi-sport competition at the World Humanoid Robot Games, wrapping up Sunday in Beijing. But they also toppled, crashed and collapsed, requiring humans’ help and leading to questions about how far, after all, the robots can go on their own.