https://earth-rover-challenge.github.io/ 2026-05-19 weekly 1.0 https://earth-rover-challenge.github.io/assets/frames/poster-1.jpg Earth Rover Challenge — IROS 2026 Earth Rover Mini+ driving on a city sidewalk. https://earth-rover-challenge.github.io/assets/images/iros-group-photo.jpeg Earth Rover Challenge participants at IROS https://earth-rover-challenge.github.io/assets/images/real-world.jpg Real-world rover evaluation across cities